An average editor can be an excellent teacher, and vice versa. Personally, I've never liked tutorials that center on the tool, unless it's specifically necessary. Video editors are pretty much all the same. The art is in knowing how and when edit, and more often than not, tutorials concentrate on features rather than on techniques. I've never watched his tuts, so I'm off topic, but it's important to keep that in mind. I'll often find people who know every button in an editing suite but couldn't give rhythm to an edit, and I've worked with a few people who knew only the basic tools, but were able to make me watch full lengths docs about completely uninteresting topics. That's the beauty about editing, you can focus on the skill, not the tool: new software comes and goes, but editing stays the same, you just have to adapt a bit. Over the years I've used Speed Razor, Blade, Liquid, Premiere, Final Cut. In five years, FCPX might be a thing of the past, and yet, you'll still be able to make the same cuts. Some software make it much easier/quick, but you can get the same result from pretty much anything.