Well, macintosh has one that’s like $10. They used to come with the laptops. They work just great, although you have to be careful if you have two macs in the same room since it’ll work on any mac indiscriminately, aka pausing your video might make iTunes in the other computer start playing. It’s funny till it’s annoying. :) edited to add that I assume it only works on macs, so if you have a windows machine I guess this isn’t very helpful… Sorry!