idk, youtube worked a lot better than any avatar. I tried avatars at first with little success.

and you don't need any guide it's dead simple:

  add video source
    path: path/to/your/video
    loop video checkmark: yes

  Start Virtual Camera

then just select it when prompted in browser.

The left/right movements are sort of a meme for most checkers and just pass randomly, the ones that need you to open your mouth get bypassed by them talking in the video.