Even though I wish there were better videos of the La Concorde gig, overall tbf I've never cared that much for it due to the tracks just being taken from the albums without any new additions
In fact, I really like the La Concorde single because it has unique versions of Equinoxe 7 and 8 (also horrible fake audience samples, so it's not like those were invented for the Welcome To The Other Side tracks
). I haven't checked any La Concorde videos in years, but I don't think those special versions were used in them?
Also, I've got no idea if it's true or not (never actually looked into it), but I once heard that the whole "Betamax is slightly better than VHS in quality" is actually the case but in a different way that most people think it is - namely, that the studio quality/professional Betamax tapes were far superior to VHS, but those were made for TV companies and the like. So maybe if the La Concorde Betamax tape is one of those "pro tapes", it might indeed be better in quality.