Unfortunately piracy concerns prevent video downloads, or so I understand. I'd think the Chess Mentor would be the way to go for a good run at serious study. Less bandwidth (or whatever you kids call it) too. 
Here in the west you can always find some free WiFi somewhere. Sorry to hear you're not as fortunate. Good luck!
Inquire diamond function
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Morning everyone. I'd like to know more about chess.com diamond function, particularly concerning the video lessons. First is if I upgrade to the diamond level, could I download videos to my mobile device, such as iPad? Cause I am an Chinese user, and there's no unlimited 3G or 4G available, the tariff of cellular data is quiet high. Another concerns how practical the video lessons are. My average Elo maybe about 1700-1800, if I persistent follow these courses, could I level up my Elo to a huge extent? Of course , playing chess for me is just a hobby, nevertheless I wish be advanced to 2000+ ability, and if that goal realised, I can participate some intermediate level tournament which my current Elo is inadequate. Many thanks!