Still rocking Froyo or Gingerbread devices that fail to stream in HD? Fret no more, the new app update from YouTube will bring HD res YouTube streams to all those devices. Although Honeycomb and ICS devices have been rocking this for some time now, the new app now allows streaming on all those devices that were left out.
Still not all devices will be able to enjoy this app as the update is dependent on screen size and resolution. Alternatively you can find the .apk online and install it! which may or may not work for you.