I guess it has to be said, are the videos authentic? I haven't seen anyone in the media outlets question the veracity or claim the they have been determined to be genuine.

If they are, this is a weird fucking twist and I can only believe the Prigozshin feels that the Russian regulars are so weakened and separated that he has the ability to extract whatever justice* he feels he is due. But, also, did he have a gay lover who was killed in that missile strike? That's the only reason I can think that he would march to extract revenge without just being clear that he's planning to take over the country.