There are a bunch of people I watch, Paul is one of them. Some people post on facebook to groups like the Djinn owner's group, quad line kite groups, Rev's group, etc. Random people also post videos from kite festivals, I watch those as well.
Plus there are years of videos here on the forum, many winning (and non-winning) routines spanning decades. People went through the effort to convert the old VHS videos over, they're good to watch for ideas.
There are a lot of amazing demo fliers out there. I want to reach the point that when I go to events, I can be on the other side of the ropes. That's happened at a few casual events, but I'd like more.