I like those "Vidoes" better than the run of the mill variety for sure.
I have...3 or 4 different versions of Modesto's most famous piece and I have to say I'm not a big fan of ELP's take on it, my Classical versions put it in the shade.
If you can get a copy of the old Telarc vinyl record it is the best one I've heard, I have the CD and it's very good too.
If you feel really adventurous check out Alfred Brendel's solo piano version, that is what it was intended to be, Ravel was the genius who transcribed it for full orchestra.