“That’s essentially two frames now!”
In filmmaking the saying goes, the person who makes the final decision on how your movie will look is the projectionist. On the Internet, apparently it's You...
I doubt editors or producers are aware of this technical issue behind Youtube & H264 encoding. And yet it’ll hardly matter as Youtube is not the main exhibition venue for them.
In the end, people will simply dismiss this as a Youtube/online video thing that no one hardly notices or cares, and Youtube will fix this technical bug one day.