Do you want to download Youtube videos with high speed. I gotta solution for you. You can easily download Youtube videos in pc in 3GP, Mobile MP4, 720p and 1080p videos using Google Chrome and Internet Download Manager.
Follow the steps ------
1. Download Google Chrome.
2. Download IDM and lifetime patch beacause IDM registry fails after 30 days. Install IDM Downloader and paste the patch file in C:\Program Files\Internet Download Manager\ and install the patch.
3. Open Youtube website with Google Chrome.
4. Search for any video and click it. After sometime you will see buffering of the video and a option of " Download this Video " on top right corner of the video
5. Click on "Download This Video" and Click on any link as per your need.
6. You will get this diologue box..
7. Click on " Start Download " and the video will be downloading...
9. After completion, Play and enjoy the video....... :)
If any doubt, ask in comments.....