As someone who is learning Japanese and is struggling through learning conjugations.... this is not explained simply to me.
Maybe it's because I'm at a different part of my learning journey, but this seems to go on and on and on about godan v ichidan verbs but doesn't touch on the actual conjugation (ie. how to turn "drink" into "didn't want to drink"), nor on plain form (everything is in polite form), and te-form gets a very very short mention at the end x_x
Also, the romaji did my head in but I understand that was done for a reason (I don't agree with the reason, but at least there was one)
does this help? https://www.youtube.com/watch?v=cGA6Tj9_lSg