As most people seem to be unable to accept any criticism or manage to make use of it, you may not open the spoiler if you're not interested in honest criticism as the following text might hurt your feelings deeply and verbalize aspects you do not want to hear.
You have been warned:
The music is boring and therefore it probably is well chosen as it does not push the game(play) into the background too much. I still think that it is too loud, you can barely hear the game sounds so in the end it felt more like a music video than a frag video. The impression of a music video even intensified since there was no connection between what we see and what we hear (besides the intro).
The looks are as boring as the music, you only show maps which use the dust.bmp tileset. A bigger variety of tiles/maps shown would have been nice, we only see half a dozen of green and/or brown tiles which even look quite similar. We all know that cs2d was not made to be eye-candy, so you should try to do more cuts and play with effects and stuff next time.
As I am no so-called professional cs2d player I can't judge about the skill you show in the video. However we only see you walking straight forward (which is, due to bird's-eye view, boring) and raping everyone without anything special to happen (which is, due to lack of anything special, boring as well). Dropping and taking weapons has nothing to do with doing frags, so you should cut out parts like that in your next video.
Video quality and length are good. I guess for the first frag video it's well done, I probably made it look worse than it actually is. I anyway left a like, may it motivate you to improve.
Edit: Assuming there are other opinions as well I'm sorry for killing this thread with that wall of text.
Also Justin Bieber wants to be fucked and is looking for anyone who could help him with that problem. Enter the server, you can find him there. Huehue.