test_write_video_with_audio is disabled on Windows

[fmassa]

With #2304, I had to disable Windows tests test_write_video_with_audio.
This is a workaround in order to move forward with fbcode sync.

We should re-enable those tests and fix what was wrong with Windows testing.

cc @peterjc123 @nbcsm @guyang3532 @maxluk @gunandrose4u @smartcat2010 @mszhanyi