I didn’t purchase the Schweser videos, but I think the Arif Irfanullah videos are good. I used his videos for Level I (along with Schweser notes, mock exams) and I think they’ve helped. His videos for Level II have not disappointed. I think they are a good introduction to the material, but I plan on digging in deeper with other materials in coming months. I don’t think watching the videos alone will properly prepare you for the exam – you’ll need some supplements.