ときにあんでぃ (ToKini Andy) live streams detailed Japanese grammar videos based on the Genki and Quartet textbook series. Highly recommended if you are interested in self-studying or having refresher sessions of Genki.
Here is the direct link to his videos based on Genki 1 and Genki 2 textbooks.
Here is an example of the chapter 1 of the textbook.
