This is pretty funny, kinda suggests they have no faith in the engineers they work with... ffmpeg is an awesome piece of work, but if it's a bug they can repeat to some level, then like you said, it 100% a them problem!
E: oh, was thinking it was a pm raised it, but seems it was possibly one of their developers, brutal....
If they weren't such weasels and actually agrued back rather than just ban people like the spineless dimwit twats they are, I'd say the argument that they are easily filtered holds. But given they are just looking to propagate their shilling for Russia, trump (and they definitely do this) etc... fuck em!