There are many websites around providing services to download youtube and other videos for offline watching. Some of these websites also spread malware, spyware and viruses when you browse their website. But now thanks to google that you do not need any help from these illegal websites as now you can download all of your  videos straight from google youtube itself. The video will be downloaded from Youtube in MPEG-4 i.e MP4 format which can be played directly on iPod and other portable devices offline. To Download your videos from youtube please follow these easy steps as you see in this video