Firefox lovers can enjoy one click download by using plug in called Video Downloader. It's completely Free.
Download with help of sites:
There are many sites with offers you to download youtube videos.
- youtubex.com is one of them. But main drawback is, site contains some malicious scripts. So not advisable option.
- Johntp has reported that kissyoube is very file option. Just navigate to your favorite video and add kiss before is as shown in below:
Now just add kiss to it.