I, too, would like the winter winds to teach me about Rust.
No and no, it’s just hype IMO. But the trickle of new users seems sufficient to make Lemmy a more interesting place to be and a more viable platform long term. That’s already quite good if you ask me.
Could also help to deactivate the personalized advertising functionality in the Google/YouTube settings (basically wipe currently stored preference, the forbid YouTube from making suggestions based on your interests). This will keep her feed fairly generic (and bad, oh boy) so that she would have to actively search for or subscribe to these videos.
In my experience, these YouTube channels buy that simplicity in exchange for leaving out many (important) details. Sure, college professors aren’t all didactic geniuses, but making things accurate usually requires to also make it more complicated.