Something else that i found out about at the Ulearn conference was quietube! This is a fantastic tool that you can use to watch videos, say on youtube, without all the distractions. You can load the video that you want to watch through this site, and it takes all of the advertsing and other smaller clips away. I can see it will be effective in my class as often when we are watching clips and information in class, children are distracted by the things that are happening around the rest of the page, particularly on sites such as youtube. check it out for yourself following the link below:
http://quietube.com/