How to watch high quality videos on Youtube
YouTube is notorious for its low-quality videos, even though it is the world’s most popular video streaming and video sharing website. Probably the reason is this: First the uploaded videos are converted to flash, and then their FLV files are streamed through players, which produces the resulting low quality video effect.
Here is a trick for turning notoriously low-quality YouTube flash videos into high quality 480x360 Mp4 format. This won't work on every video, but will make a huge difference for many.
The trick is to append &fmt=18 at the end of URL of the YouTube video you are watching.
Lets say you have a YouTube video with the following URL: