chessexplained on youtube is great
https://www.youtube.com/user/chessexplained?feature=results_main
Depends what you want to learn, tactics, strategy, endgames? I really enjoy Danny Rensch's live sessions/member analysis videos, Elliot Liu has some good ones on attacking, if you check the video guides there are some good collections on various themes.
There are a number of good authors, have a look and see who you enjoy.
My suggestion is start going thru the series of videos on Nimzovitch, Rubinstein and other great GMs. They're pretty awesome IMHO and so are the "Amazing Games"
I am beginner in Chess with Chess.com ranking of 1500-1600. Can you suggest video series lessons from Chess.com library that can be most helpfull for me. Thanks Arie