This is a dead thread, more or less, but I'm a bit embarrassed about this. For posterity:

The footage I've seen was indeed from (and up to) the basecamp. I was quite shocked at what I saw, but I obviously misremembered exactly what it was - the trail to the basecamp. I certainly did not think all those people were reaching the summit, but I did think they were going higher.

I feel like a bit of an idiot, and needed to get that off my chest.