Plenty of mind-numbing background music, but still worth checking further to see whether these "animated teaching videos for ESL and EFL learners" (About Us, ¶1, 2017.02.24 [JST]) might be suited to particular learners' needs
NetGrammar provides extensive grammar practice through a great variety of reading, writing and listening activities. It is suitable for self-directed learning and also as an extension to regular classwork.