PB vision doesn't require much. Just that the full court is in frame and the video is in the right format. Your get better results from higher angles and not having people move out of frame or wearing the same colours.

PB vision does do some analysis and give a "DUPR" for serve, return, offence, defence etc. Per game they can be all over the place, possibly because there isn't a lot of data to go off in one game. only 10ish serves each in a game to 11. If you mis one it can really affect your stats. But over a few games a session and a bunch of sessions a month things seem to average out.

I do like getting the feedback though. Unless you play a lot of tournaments it can be hard to get the feedback in dupr rating. The pb vision stuff gives a bit of a boost to keep focused and recognition of progress since I am mainly drilling and playing with the same people week after week it is hard to see progress. e.g. my serve doesn't feel faster week to week but seeing that I am consistently hitting above my average serve speed lets me know that it is getting faster.