Are you looking for comentary with the files? If not and just trying to see what the player is doing, then you are simply looking for replay files. In the replay file you can take on the view of a particular player and see how they have their keys set up, what they are controlling and where they are looking on screen. (But this is closer to what it sounds like you are looking for).
If not and you are looking for matches between players with a caster (like Day9) commentating on the game and things to make note of during the games, then you are looking for SC2 casts. A number of online casters do a fairly good job of providing games between high level players and offering insightful comments about what the players are doing. For example, Day9, Artosis, HDStarcraft, and HuskyStarcraft are several popular and knowledgeable casters out there, you can find their channels on youtube and watch to your hearts content (They have a few hundred videos out there each, maybe not Artosis since he does the GSL casting, but there is a lot from the other 3 I've mentioned). There are other casters such as Psystarcraft, TotalBiscut, and DAppollo.
The NASL (nasl.tv) is also a league that is currently running that provides you with similar insights to matches between high level players. If you catch it live it's a free show to watch.