I hate to be an ass ... but that had almost zero educational value.
I mean, what exactly is the viewer supposed to take away from the video? That modes are simply a C major scale, but starting with a different note? Frankly, I did not have the impression you knew yourself what modes are good for. All you did was the run the C major scale up and down, starting at different notes. That's not the point of modes.
For starters, I absolutely fail to see how you want to teach the point of modes, without a single chord in the background. Without a chordal context, all the listener hears is a C major scale, and rightly so.
If you had put a Dm chord under your D Dorian scale, the listener would have actually realized that Dorian is kinda a minor scale, but with a major 6th. That major 6th is what gives the Dorian mode its unique sound.
Sorry to write such a scalding post, but I absolutely hate these leagues of guitarists that perpetuate the notion that modes are this thing absolutely necessary to guitar playing, and that they're just these patterns your learn on the fretboard. Yes, there is a use for modes, but for the stuff we do (rock, metal), it's negligible. Rather focus on something useful such as ear development. You can pave the road with guitarists that can play scales up ad down in lightspeed, but need half an hour to figure out "Mary had a little lamb" without a tab.
rumborak