View Pure is a great way to show YouTube clips in class without all the on-screen clutter and dodgy comments. I've written about ViewPure in the past, but the site has had a revamp and is worth another blog post!
Basically you go to ViewPure website, enter the URL of a YouTube video, or do a search, and it then displays the video on a class-friendly page without any of the on-screen clutter.
ViewPure removes all comments, ads, and related videos, allowing videos to be watched without distractions, or more likely, without "inappropriate content".
Read more http://www.whiteboardblog.co.uk/2014/08/viewpure-watch-youtube-videos-without-clutter/
Wordwall allows a teacher to enter just a few words and with a couple of clicks, make a resource that would have been impossible with traditional presentation software. Wordwall supports a range of teaching stategies and doesn't railroad you into one way of doing things.