answer:The Vixia HF S10 is rated at 1080p so yes, it is HD… However, YouTube HD is only capable of 720p resolution (still HD) and recommends these setting for your video: H.264, MPEG-2 or MPEG-4 format 1280×720 resolution 44.1KHz Stereo MP3 or AAC audio Frame rate as the original video Up to 1GB file size and 10 min. duration Also, you must have Flash Player 10 or later installed in your computer to be able to watch higher resolution YouTube videos. You also need to set-up you YouTube account for HD viewing by doing the following: On your YouTube Account page, click on Playback Setup and you’re now able to choose “always show me higher quality when available” or “I have a slow connection. Never play higher-quality video” which is set by default. So if you want to turn on HD, you must set “I have a fast connection. Always play higher-quality video when it’s available” but only if you have a fast internet connection, otherwise you might find that videos don’t play as quickly or smoothly.