There is a guy at my field who also has a video setup, and he let me fly it a bit. He has a set of goggles that work pretty well.

The plane is a Senorita with a 4-stroke on there, a very gentle flyer. Judging altitude was really hard, and I got "lost" at least a couple of times, since everything looks different up there. I didn't try anything more than a couple of passes down the runway, but the guys who have more time can take off and land on the goggles.

They always have an experienced pilot on the master transmitter and the guy on the goggles is on a buddy box for safety.

Also, he does have occasional issues with the video downlink not being as solid of a connection as you'd like, it sometimes gets static or can drop out entirely. Part of it might be his choice of antennas and such, I'm not sure, but I know he's working on it.

There is a guy in germany who took it to the next level. Goggles that have gryos built in, and a pan-and-tilt camera setup in the plane. This allows you to actually "look around", with the camera tracking the pilots head movements. The guy here is working in that direction, but he's not there yet.

It's all pretty cool stuff, but it IS advanced stuff, and it really requires multiple people to do it safely to avoid smashing things up. When it works, it's really cool.