No I did not joke. If you bother to open one of the playlists I referred to, you can find e.g. 10 rear delt exercises demonstrated in under 15 second videos with extremely good tldr advice.
https://www.youtube.com/watch?v=34gVHrkaiz0&list=PLyqKj7LwU2...
Mike Israetel who runs the channel is in the top-5 in scientific body building circles.
And you can get those same videos in their app https://rpstrength.com/pages/hypertrophy-app
Personally I'd use Jefit or Hevy over RP, but the point stands.
Every point you make is fair but the point still stands: you had to find this stuff first.
And if I did not know about him and typed "rear delt exercise" into Youtube, there will be an endless amount of slop before I personally would run into this guy.
I'd gladly pay for this guy's app if I were in the market for a new workout plan. My point is that free content does not eliminate the market for paid content.