This is relatively new channel which was only started back in May. Great quality there though:
https://www.youtube.com/channel/UCk1As8lMx7rEj6yYkQkkQ-A/videos
Sorted by N5 to N3 level, there are two types of videos there, one that [shows you and explains](https://www.youtube.com/watch?v=hbe0MZDtkwo) all the kanji in the JLPT group and the other with [words you have to read quickly](https://www.youtube.com/watch?v=EoFl8f2V2NU) in few seconds. Recently he also added [JLPT vocabulary tests](https://www.youtube.com/watch?v=w2NXPqcwhE8).
Really dig this channel and its low amount of subscribers is almost criminal. The guy puts some real effort into those videos. Please give him some love and support, he really deserves it.