diff --git a/content/courses/course2/index.md b/content/courses/course2/index.md
index 48908a12b..d67616ea9 100644
--- a/content/courses/course2/index.md
+++ b/content/courses/course2/index.md
@@ -30,7 +30,7 @@ This course covers topics related to profanity in Early Irish. It relates such p
 
 ##### Introductory video
 
-0. [Lecture video 0](https://youtu.be/nSbrF_ZWE_M)
++ [Lecture video 0](https://youtu.be/8ihJsf-AXdA)
 
 ##### Introductory readings
 
diff --git a/content/data/data1.md b/content/data/data1.md
index fe4d3c006..0fe2949b8 100644
--- a/content/data/data1.md
+++ b/content/data/data1.md
@@ -16,7 +16,7 @@ disableAnchoredHeadings: false
 
 ## Overview
 
-This dataset contains all irregular verbs in all known Romance languages—including Portugese, Spanish, French, and Italian. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
+This dataset contains all irregular verbs in [all known Romance languages](http://www.alexandermccallsmith.com/series/von-igelfeld-series)—including Portugese, Spanish, French, and Italian. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
 
 ---
 
diff --git a/public/courses/course2/index.html b/public/courses/course2/index.html
index 0edfda3b5..28e9e0d0b 100644
--- a/public/courses/course2/index.html
+++ b/public/courses/course2/index.html
@@ -218,10 +218,10 @@ <h1 class="post-title entry-hint-parent">
 <li>Vivamus auctor nunc ac augue dapibus, in fermentum enim hendrerit. Duis et ultrices sem, eget efficitur lacus.</li>
 </ul>
 <h5 id="introductory-video">Introductory video<a hidden class="anchor" aria-hidden="true" href="#introductory-video">#</a></h5>
-<ol start="0">
-<li><a href="https://youtu.be/nSbrF_ZWE_M" target="_blank">Lecture video 0</a>
+<ul>
+<li><a href="https://youtu.be/8ihJsf-AXdA" target="_blank">Lecture video 0</a>
 </li>
-</ol>
+</ul>
 <h5 id="introductory-readings">Introductory readings<a hidden class="anchor" aria-hidden="true" href="#introductory-readings">#</a></h5>
 <ul>
 <li><a href="https://pascalmichaillat.org/13.pdf" target="_blank">Paper 1</a>
diff --git a/public/data/data1/index.html b/public/data/data1/index.html
index 5b3938c08..bcc1b95f9 100644
--- a/public/data/data1/index.html
+++ b/public/data/data1/index.html
@@ -69,8 +69,8 @@
   "keywords": [
     "Romance languages", "philology", "irregular verbs", "Portuguese", "Italian", "French", "Spanish"
   ],
-  "articleBody": "Overview This dataset contains all irregular verbs in all known Romance languages—including Portugese, Spanish, French, and Italian. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.\nView Irregular verbs in Portugese: dataset Irregular verbs in Italian: dataset Irregular verbs in French: dataset Irregular verbs in Spanish: dataset Construction of the Portugese and Italian datasets: paper and online appendix Construction of the Spanish and French datasets: paper Source of data Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.\nDescription of variables Lorem ipsum dolor sit amet Consectetur adipisicing elit Sed do eiusmod Tempor incididunt ut labore et dolore magna aliqua Ut enim ad minim veniam Quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Using data with Python Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.\nStart Python: Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.\nimport numpy as np import pandas as pd Open the file: Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.\nfile_path = 'data.csv' with open(file_path, 'r') as file: Read data: Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.\nlines = file.readlines() Parse and process data: Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.\ndata = [] for line in lines: line_data = line.strip().split(',') # Split the line into a list of values line_data = [float(value) for value in line_data] # Convert values to floats data.extend(line_data) # Extend the main list with values from the line Compute summary statistics using NumPy: Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.\ndata_array = np.array(data) # Convert the list to a NumPy array mean = np.mean(data_array) median = np.median(data_array) std_dev = np.std(data_array) min_value = np.min(data_array) max_value = np.max(data_array) Display summary statistics: Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.\nprint(f\"Mean: {mean}\") print(f\"Median: {median}\") print(f\"Standard Deviation: {std_dev}\") print(f\"Minimum Value: {min_value}\") print(f\"Maximum Value: {max_value}\") ",
-  "wordCount" : "566",
+  "articleBody": "Overview This dataset contains all irregular verbs in all known Romance languages —including Portugese, Spanish, French, and Italian. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.\nView Irregular verbs in Portugese: dataset Irregular verbs in Italian: dataset Irregular verbs in French: dataset Irregular verbs in Spanish: dataset Construction of the Portugese and Italian datasets: paper and online appendix Construction of the Spanish and French datasets: paper Source of data Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.\nDescription of variables Lorem ipsum dolor sit amet Consectetur adipisicing elit Sed do eiusmod Tempor incididunt ut labore et dolore magna aliqua Ut enim ad minim veniam Quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Using data with Python Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.\nStart Python: Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.\nimport numpy as np import pandas as pd Open the file: Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.\nfile_path = 'data.csv' with open(file_path, 'r') as file: Read data: Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.\nlines = file.readlines() Parse and process data: Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.\ndata = [] for line in lines: line_data = line.strip().split(',') # Split the line into a list of values line_data = [float(value) for value in line_data] # Convert values to floats data.extend(line_data) # Extend the main list with values from the line Compute summary statistics using NumPy: Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.\ndata_array = np.array(data) # Convert the list to a NumPy array mean = np.mean(data_array) median = np.median(data_array) std_dev = np.std(data_array) min_value = np.min(data_array) max_value = np.max(data_array) Display summary statistics: Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.\nprint(f\"Mean: {mean}\") print(f\"Median: {median}\") print(f\"Standard Deviation: {std_dev}\") print(f\"Minimum Value: {min_value}\") print(f\"Maximum Value: {max_value}\") ",
+  "wordCount" : "567",
   "inLanguage": "en",
   "datePublished": "2013-03-07T00:00:00Z",
   "dateModified": "2024-05-08T00:00:00Z",
@@ -218,7 +218,8 @@ <h1 class="post-title entry-hint-parent">
 </div>
 
   <div class="post-content"><h2 id="overview">Overview<a hidden class="anchor" aria-hidden="true" href="#overview">#</a></h2>
-<p>This dataset contains all irregular verbs in all known Romance languages—including Portugese, Spanish, French, and Italian. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
+<p>This dataset contains all irregular verbs in <a href="http://www.alexandermccallsmith.com/series/von-igelfeld-series" target="_blank">all known Romance languages</a>
+—including Portugese, Spanish, French, and Italian. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
 <hr>
 <h2 id="view">View<a hidden class="anchor" aria-hidden="true" href="#view">#</a></h2>
 <ul>