Originally Posted by ralphcramdon
Live and learn.
Did not know that -- guess I had the thought some sort of buffer was written in advance of real time and just playback was real time.
What's the deal with these progress bars (gray and red) then?
Streaming is the same as downloading, only it's downloading to a temp location (at least when talking about sites like youtube. there are other types of streaming that functions a bit differently, but that's another topic).
On youtube, the gray bar is the download progress, the red is the playback point. So if your playback point catches up to the gray download progress, then it has to pause to wait for more to be downloaded (called buffering).
Screen capture software does capture in real time. Say you didn't wait for the whole video to load (gray bar full width of the player) and you were recording playback and the playback caught up to the download progress and had to buffer, the screen capture would record the buffering as well. Same goes with a DVD recorder.
If there is a download option, and there are several ways for youtube, then that's the best route. You're getting the original youtube file and your computer doesn't have to do any of the encoding that is required with screen capture software.
I don't have much occasion to do it, but I've use Firefox with the Video Downloadhelper and DownThemAll (download manager/accelerator) add-ons to get clips at very good download speeds.