It's not about the material, it's about the presentation. Look at the difference in presentation from the UND Aerocast to King videos.
I see graphics that are boring in one, but get the point across, and some beheaded off screen voiceover and a dude playing with a flight sim in the other.
Neither rises to the level of the old Jeppesen videos where mostly everything was actually shot in a real aircraft, other than brief intro segments.
(The multiengine Jeppesen video is nice. It's like an hour of footage of a Cessna T303 Crusader, which I've always thought were sexy with that goofy cruciform tail. Obviously shot sometime in the 80s, judging by the cars on the roads below. And near Denver somewhere which, makes sense. Considering it's Jeppesen.)
Well, King does like to put some airplane footage up in a box behind John's head, at times.
I hear the Sporty's videos are nice and use relatively modern aircraft in flight for most things, but haven't watched one.
You know my favorite videos? The ones someone else paid for years ago on their shelf that you can borrow to watch for free.
If the actual lesson content didn't change or didn't change dramatically, other than a legal change or two that can be discussed after the video, free old videos are awesome.
I can stay wide awake, without complaint, for a long time, when it's free.
I'd watch all of them on a topic and compare them if I was weathered into an FBO with a shelf full of them and an operable VHS machine.
It's the comparison of teaching techniques I'd want to see. Call it a new instructor curse. Hahaha.