Still picture/found footage film virgin, advice?

I have seen a few of these types of films which sound interesting, but I’m not sure if I should bother as I won’t easily be able to get ahold of them.

My only exposure so far has been La Jetee, it was ok but at 20 minutes that probably mattered, 2 hours is a different animal.

The two I was interested in seeing are San Soliel and Mist Through The Palm Trees.