Ah, now I get, what you imply. I know, snow can be heavy, but the amount and height shown in the video doesn't seem enough to me. We'd have to calculate a bit...
Plus then there's still the question of why they left the tent in the first place.
I let perplexity calculate. Or rather judge plausibility.
It seems, that a collapse of a snow cave build for 4 or 5 people as well as one big one for everyone could indeed result in the documented injuries. At least with enough snow on top, which would be around 1 to 3 m height. That is plausible to have been in the ravine around the time. No definitive proof, just a concept of plausibility. So a definitive: Might be possible.