A hip hop music video is immediately recognizable in its style; from bubble lenses to camera shots from the ground up, people know what they're looking at right away. Here's several places online where you can watch a hip hop music video for free, download award winning songs from hot new artists, and basically turn your computer into your own personal MTV...
AOLMusic is a great place to start. They've got a wide selection of hip hop videos that are updated constantly. They include a New Artist section which allows you stay on top of your favorite artists new releases. The navigation is clean and easy to find what you're looking for. However, if you're looking for underground rap videos, this is not the place. For that you need to check out...
UndergroundHipHop. Their video selection is top notch and geared towards underground artists you would never, ever see on AOL. Artists like Brother Ali, Kool Keith and Atmospshere are all well represented. The viewers are entertaining as well; these guys and gals have no problem telling it like is on a new video release, regardless of the artist!
Interested in getting crunk? The Dirty South is well represented on VideoCure, which at the time of writing had over 750 videos on the Dirty South alone. In addition to southern hard hitters like Lil' Wayne, they've got a large selection of compilation videos as well. For anyone on MySpace, VideoCure makes it easy to embed a hip hop music video directly onto your MySpace page (exactly like YouTube).
MusicVideoRap airs streaming (meaning no downloads) uncensored music videos. Like the other sites listed, there's the standards New Rap Releases, as well as a series of Freestyles by aritsts like Snoop Dogg and Eminem. What separates this site from the others is the extensive number of articles on all things hip hop: including new aritsts, freestyle methods and reviews of top rap artists.
These four websites will provide you the chance to explore how different sub genres approach the hip hop music video- such as the underground's use of narratives versus the party atmosphere of the Dirty South- and hopefully provide hours of entertainment as well! These are the channels for the hottest rap and hip hop artists songs and videos, most of which you can watch for free. I believe that in a short amount of time music videos will have dominated the Internet, and watched almost exclusively online instead of on stations like MTV.