I also suggest that he may be promoting erroneous information about the videos to misdirect from or discredit ACTUAL instances of faked footage, such as this one of AA11 hitting the North Tower from Al-Jazeera:
So it might be a combination of both: to mislead people from studying the footage more meticulously and to discredit real or proven instances of video fakery after it's shown that he lied about the visual evidence of the attacks.
I also suggest that he may be promoting erroneous information about the videos to misdirect from or discredit ACTUAL instances of faked footage, such as this one of AA11 hitting the North Tower from Al-Jazeera:
https://m.youtube.com/watch?v=QF9qW2fIahM
So it might be a combination of both: to mislead people from studying the footage more meticulously and to discredit real or proven instances of video fakery after it's shown that he lied about the visual evidence of the attacks.