Someone could thumb through past YT videos (not scrubbed yet) of Biden in the White House from Jan 2009-Jan 2017, or live news interviews with him with the big networks or news programs, etc. No CGI or fakery that I can see. The fake stuff seemed to begin about June of 2020, when people started remarking on his facial appearance (bad plastic surgery) and spending an unusual amount of time in the basement or behind a mask. There was a clear delineation.
Mark