YouTube offers a HTML5 beta which is using the HTML5 element instead of the Flash player. You can activate the beta at http://www.youtube.com/html5. You need to be using a recent version of Firefox, Safari or Chrome.
Then go to the video page you want to download. Open the source HTML (Ctrl-U on Firefox) and go through the source code and find the element. It's even easier with Web Inspector or Firebug. The element's src attribute has the url of the video in it. You can download it with the browser by pasting it in the URL bar. Instead of downloading it your browser might display it. In that case do a right click and then something like "save video".
Caveat: The HTML5 player isn't activated for videos with ads in it.
I might write a little bookmarklet that does this on a button click.
Do you know HTML?
YouTube offers a HTML5 beta which is using the HTML5 element instead of the Flash player. You can activate the beta at http://www.youtube.com/html5. You need to be using a recent version of Firefox, Safari or Chrome.
Then go to the video page you want to download. Open the source HTML (Ctrl-U on Firefox) and go through the source code and find the element. It's even easier with Web Inspector or Firebug. The element's src attribute has the url of the video in it. You can download it with the browser by pasting it in the URL bar. Instead of downloading it your browser might display it. In that case do a right click and then something like "save video".
Caveat: The HTML5 player isn't activated for videos with ads in it.
I might write a little bookmarklet that does this on a button click.