Simon's E2 tutorial from 2017-01:

Simon's E3 on Easy tutorial from 2021-08:

Easy is slower than Hard in E3, but it's very good to learn the run on Easy first. You can still add Medium or Hard later for optimization.

Simon's E4 on Easy tutorial from 2021-08:

Again, Easy is slower than Hard in E4, but it's very good to learn the run on Easy or Medium first.

Simon's E5 tutorial from 2017-08:

I haven't cut this. It's long, with mediocre information density, but it certainly shows all the modern routing. The important part is the first slow complete playthrough. Afterwards, I'll go through E5 again quickly, then comment on Marbelara Drageen placement, then show the boss softlock. Ideally, I'd cut and edit the video, putting all the material in the run's order.

Also, error: I don't down+jump on the tree in Marbelara 1. I didn't realize that during the ad-hoc tutorial. If you find a good strat with down+jump there, by all means use it still.

Vortale's Ep. 1-6 tutorial from 2015:

The classic. Some tech is outdated, but it still offers good all-around information on Jazz physics.