Watching people use the app in person is super important for design decisions. You can see their reactions, ask them questions, and generally just get way more information than you could from a video capture.

I could see tech like this being useful for submitting with bug reports or something? It's a hard sell though, seems a bit like overkill. You need to have decent testers that will use it, gotta deal with big video files, their's privacy concerns and capturing video will eat up cpu/resources and slow down the app.

So again, potentially useful, but I don't think they've made a good case for why it's worth the hassle.