Handle videos with begin_stream_seconds > 0 #338

Job	Run time
generate-matrix / generate	4s
Build and Upload wheel / manywheel-py3_9-cuda11_8	6m 59s
Build and Upload wheel / manywheel-py3_9-cuda12_1	6m 51s
Build and Upload wheel / manywheel-py3_9-cuda12_4	7m 59s
Build and Upload wheel / upload / manywheel-py3_9-cuda11_8	15s
Build and Upload wheel / upload / manywheel-py3_9-cuda12_1	13s
Build and Upload wheel / upload / manywheel-py3_9-cuda12_4	17s
install-and-test (3.9, 11.8, 5)	5m 23s
install-and-test (3.9, 11.8, 6)	10m 52s
install-and-test (3.9, 11.8, 7)	10m 53s
install-and-test (3.9, 12.1, 5)	5m 50s
install-and-test (3.9, 12.1, 6)	13m 42s
install-and-test (3.9, 12.1, 7)	13m 47s
install-and-test (3.9, 12.4, 5)	6m 2s
install-and-test (3.9, 12.4, 6)	14m 10s
install-and-test (3.9, 12.4, 7)	19m 28s
	2h 2m 45s

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