Ok so here's my report. First, when you posted the screenshot above (extremely helpful - thanks!), it brought memories because I know I've seen these options in the past; However, when I went to view some SLR video files and others with DeoVR, I realized that some video files have these options and some don't. And some only have a couple of these format options.
I went into the global settings for Deo and saw a Developer Setting option for "Dynamic Mesh". I enabled it, and it seemed to make somewhat of a difference. The best option seemed to be copying "_MKX200" into the filename because when I did that and downloaded that file to the Quest2 headset, a file that would not play correctly before seems to be playing the way it's supposed to now. I say 'seems' because I'm not used to this fisheye view, but I'm pretty certain it's correct now.
I'm going to continue to report back and maybe others will learn more or share some other info. Thanks so much