Yeah, you can use it if you wish (it isn't a necessity), since the speed is slow. The quality might not be good though, but I'm sure it'll still take a while to download the video. Many people I talk to say that such accelerators only improve the caching of the web pages (some sites say that it's better to disable them while downloading music from them) so that it is going to load faster, and don't actually affect media files as much, but I'd say that you give it a try.