Vegas won't load fragmented mp4 and mov, it will load 32bit float audio, but it's just clicks. Can others confirm this to be true.
These files are from the new OBS beta, fragmented MP4 is a major upgrade because it means if computer or OBS crash you don't get corrupted files, it means recording in MKV and remuxing to MP4, creating variable frame rate files is a thing of the past. 32bit float audio means if you have your levels too high and your audio clips and is distorted you can recover it without loss.
These files work fine in the other pro editors as well as the beginner's editor Capcut, shown below
Btw, OBS now streams HEVC and AV1 to youtube