Comment:

STEP 1: To make your own mash up, simply find a YouTube video URL (like this one) that allows embedding (if it doesn't allow embedding it'll say so in the Embed text box) and enter it into the URL text box below.

STEP 2: Then enter in a start and a stop time either in seconds or minutes and seconds (i.e. 90 or 1:30), then click save and you're done mashing!

NOTE: If you've logged in you can go back an edit or delete your videos later, but you don't need an account to mash. ;)