Simplify video buffer capturing (#611) #4

Job	Run time
test (macos-13, 14.2, iOS Simulator,OS=17.2,name=iPhone 14 Pro)	11m 57s
test (macos-13, 14.2, macOS)	4m 24s
test (macos-13, 14.2, macOS,variant=Mac Catalyst)	6m 27s
test (macos-14, 15.4, iOS Simulator,OS=17.5,name=iPhone 15 Pro)	7m 49s
test (macos-14, 15.4, macOS)	4m 20s
test (macos-14, 15.4, macOS,variant=Mac Catalyst)	4m 15s
test (macos-14, 15.4, visionOS Simulator,name=Apple Vision Pro)	1m 22s
test (macos-14, 15.4, tvOS Simulator,name=Apple TV)	1m 4s
test (macos-15, 16.2, iOS Simulator,OS=18.1,name=iPhone 16 Pro)	9m 5s
test (macos-15, 16.2, macOS)	9m 11s
test (macos-15, 16.2, macOS,variant=Mac Catalyst)	4m 26s
	1h 4m 20s

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