Yes, I’ve seen a video file that changes resolution mid-video, but it’s more of a party trick since not all players handled it well

Specifically, I saw a group chat program rendered it “correctly” (Discord? I don’t remember), so the embedded video would re-flow the rendered chatroom while playing

I think your ideas are too non-practical/specialized/advanced/low-level for your stated goal of 'digital literacy". They read more like college intro/followup course material and are too esoteric to be readily absorbed, esp by generic teenagers, even if they’ve self-selected to be “lightly interested”.