nahcirn sent me a link to these videos which are too good not to share, though they do require a certain level of Japanese proficiency before they will be of use.
Basically, Kento Sensei explains grammar points. In the first video, for example, he goes over －だらけ, －おかげ and －せい, and there are 38 videos total in this series, so he covers a lot of ground.
The trick is that the video are entirely in Japanese. (Well, not entirely. There may have been as many as 5 or 6 English words in the first one.) They are subtitled, also in Japanese, so that can help if you get really stuck.
I won’t lie to you – they are really useful, but they take some effort. The first one at least was excellent – I have watched it all the way through once and started watching it a second time. I’m learning/reviewing grammar and getting listening practice, and it’s hard to beat that.
I provided the link above, but here’s the first one:
Keep sharing the good stuff. We’re all in this together!