I created a small web app to download any youtube video thumbnail fast and easily. Every Desktop, Tablet and Smartphone should be supported. It is full responsive and light.
How to use it
1. You have a video with a great picture as thumbnail. For Example https://www.youtube.com/watch?v=zWTveU7DKIQ
2. Go to ytd.kvnxdev.com and enter the link into the textbox
3. Download it by pressing "Download"
4. Share if you wanna share it with friends, press the share button on bottom or use the link in the address bar ( http://ytd.kvnxdev.com/?url=https://www.youtube.com/watch?v=zWTveU7DKIQ )
5. The video has a label / text / etc on it? Press "More results" and get better results
Tested on: Apple iOs, Android 4.0 - 5.0, Windows 8.1
Info: All new browsers should be supported
Use it as Web App
Chrome Mobile: Menu > Add to homescreen
Safari Mobile: "Share Button" > Add to homescreen
Test, +1 and share
Its free, http://ytd.kvnxdev.com/
I hope for some people its useful and that you like it!
KvnX | Kevin