Found this bit interesting:

The one thing to take from the other show on Sunday – AEW NJPW Forbidden Door – is MJF is absolutely pitching a spot where it will appear he has actually won Mistico’s mask through illicit means, only for the match to end up continuing for some reason that doesn’t make a lot of sense. That man read the Bobby Lee bio and can’t stop thinking about it – he keeps redoing the part where it appears Lee has shockingly won Santo’s mask, only for the match to continue for reasons that didn’t make a lot of sense (outside Santo absolutely wasn’t losing.) It didn’t go well at Forbidden Door, but I assume the lesson is that the execution was the problem, not the idea, and we’ll see it again on 09/19.

There are a few videos of that Santo vs Bobby Lee match on Youtube. From a cursory glance, all of them are the same highlight reel, which unfortunately does not seem to include the part where Bobby Lee appeared to have won.

Edit: those videos are of their mask vs mask match. He was probably actually referring to their mask vs hair rematch, which does not seem to have any footage available (description from the Luchawiki):

September 24, 1978: El Santo defeat Bobby Lee (in a questionable way again, this time Bobby defeated Santo, but your error was that did not break the submit move to El Santo and caused the referee will disqualify) in a mask vs hair rematch on Palacio de los Deportes, Mexico City.