If that's what is on my interval schedule then I just end up going slow uphill. My training program dictates my power outputs, not the terrain I'm riding on. If it means going slow up a hill then so be it.

Going back to your original question I find Netflix/tv/movies to be incredibly boring when I'm trying to do 5x 20 mins. I prefer to put on some music and try to chase some people down in zwift.