The way i found is
TOR PROJECT ( TOR BROWSER )
From their own website
Tor is free software and an open network that helps you defend against a form of network surveillance that threatens personal freedom and privacy, confidential business activities and relationships, and state security known as traffic analysisIt is an opensource browser (Based on firefox ) which actually encrypts your whole internet traffic by using servers owned by volunteers all over the world ,you can even volunteer yourself. the best part of it is that it doesn't only unblock YouTube but also everything else. Specially useful for our friends in Pakistan (Where YouTube is banned and god knows for how long it will stay banned).
This is the only truly free and legal way to surf the internet anonymously. Cheers
If you run into some problems with its usage let me know ill update the post to inculde a guide for its usage.
Do let us know your experience with it in the comments.