Ideas for developing the ability to hear chord progressions by ear

I’ve been following with interest what Just (that’s his name) is doing over at Stringkick.com.
He is really good on playing by ear and is developing up tools which use youtube clips to play along with. They are graded too so they grow in complexity.
https://www.stringkick.com/blog-lessons/learn-songs-riffs-melodies-by-ear/

@Ryan good to revisit this thread as you think through eartraining.

https://www.guitarplayback.com/p/the_song_that_changes_everything
Ear training by Chris Liepe.