Not really but it depends on how many. Once the video is loaded it's usually just cached to disk for replying so it makes no difference how many times you watch it then. But when you reload it after clearing or reload another then it uses a few meg again. Best way is to download the movie in the first place.

I assume you are on a plan that limits your monthly bandwidth. Videos are the easiest way to hit your bandwidth cap. See, many people figure that since they are not actually saving the file to their hard drive that it is not downloading. While *technically* true, the ISP will consider it as downloading since there is data being sent to your computer. Most videos on Youtube are fairly small, but if you watch a few dozen then it adds up fairly quickly. Now, if you are in the habit of watching TV shows (as opposed to 3-minute music video) and/or HD, or if you just spend a *lot* of time on Youtube, then you can blow through that usage cap in a day pretty without even trying. At an average speed of 100KB/sec (what I can run on my DSL if my wife and roomie aren't using it), that is about 6MB/minute, 360MB/hour, or 1GB in under three hours. We'll lower the average speed to take into account that you will spend a bit of time searching for videos, but every page you load also counts towards that bandwidth cap (something people forget/ignore for reasons previously stated) so we won't knock *that* much off. Any site that uses Flash to present a video of their latest product may have a home page that is 5MB or more easy. Hell, even this page is a few hundred KB! Trust me; at 2.3KB/sec, it used to take me a *long* time to load certain pages here on AB. A penny isn't much. A handful of pennies *might* buy you a candy bar though, and a wheelbarrow full of pennies is serious coin. See how it *can* add up? So it really depends on how much you use Youtube. If you just watch about fifteen minutes worth of videos (about five songs worth) then not really. If you watch Youtube like TV, then I hope you don't have a bandwidth cap.