Youtube is starting to get its act together with stuff like Hi-Res videos etc, but it's not always easy to know how to take full advantage of some features, here's a handy list of the ones I use.

To link to a video with an HD option you need to add &hd=1 to the end of the url.

For region limited videos remove the watch? text from the url, like this....

http://www.youtube.com/watch?v=<somecode> to http://www.youtube.com/watch?v=<somecode>

To download a video just go to the address bar and add the word "kick" to the start of the url and hit return. (i.e. kickyoutube.com/video code here)

and one I have not tried yet but sounds cool, link to a specific start point in a video by appending the following to the url.. #t=03m22s