What does 720p, 480p, 360p, etc. mean?

We provide video at a number of resolutions so that you can decide which one works best for you. 480p is a the resolution that our YouTube videos default to playing at, 1080p and 720p are HD resolution, (not available on video that wasn't shot in HD), and look great in fullscreen mode if you have the bandwidth. If the default resolution skips and buffers frequently, give 360p or 240p a try.