Great site to find sf4 videos of the matchups you want to study up on - Street Fighter 4 Note - sf4answers

http://streetfighterdojo.com/sf4/index.html

There you first select the character you are trying to see videos for, then you select the  fighter he should be fighting in the videos. Then you'll get a list of videos showing those 2 fighters being played by top players only . I learn a great deal from watching these videos.