I guess I am a little bit late to discover this InVideo Programming feature on YouTube. Well, it started when I watched other people’s videos. I was wondering what the nice feature button on the tops of their YouTube videos.
Searching in Google, and found lots of tutorials about it, and I have managed to upload and see my watermark button on the top of my videos.
You also might be interested on setting up your gmail as your default email app here.
When you hover on this icon, it will show you the YouTube channel name, and the amount of subscribers they have.