Great lesson, and a 'module' I'm looking forward to. There isn't a whole lot out there for someone that wants to play a bit of slide, especially without going into the open tunings first.
Observation one: Common question - which finger? I use my slide on my middle finger, but I have seen GREAT guitar players using the slide on every finger except their thumb, and there's probably some cat playing in a hole in the wall dive off Burgundy street wailing to the streets doing exactly that as I write this (if the bars still never close in New Orleans, they didn't when I lived there).
Observation two: The start with single note things is spot on, but a lot of players (or at least a few 'beginners' and even more advanced ones I've met and talked to) think you can't play chords with a slide in Standard. Or at least it never occurs to them to try.
Standard makes some things a lot easier to play than open tunings, like minor and 7th chords where you'd want to fret behind the slide. Strings 2,3, and 4 give you a major triad, and strings 1, 2, and 3 give you a minor one. Both are inversions, and in both (minor especially) you can finger the root note as a bass if you want.
Anyway, I'm off to practice my scales and getting that very smooth gliss sound going. That I never knew you could get, I always got a little bit of fret sound, but that could be because my action is so low - another thing that may be worth mentioning. I knew slide guitars used higher action, now I know why.
Oh, and those muting techniques look remarkably similar to how a bass player plays. Makes me wonder how 'two finger' strumming would do...