What is the name of the app I'm looking for?

I used to use this app then I got a new iPhone and forgot what the name of the app was. I believe the icon was a letter with a rainbow background but I'm not sure. The app taught you how to do various things from whistling to dancing to being funny, and it taught using videos. I'd appreciate it if somebody knew what app I was talking about.

So after 30 minutes of searching I think I found the app you're talking about.

At first I though you meant: "How to Videos from Howcast.com."
But it didn't match the icon description so knew it wasn't it but decided to bring it up anyway.

But I'm fairly certain that the app you want is: "How To Videos: Videojug.com"
(icon is a "V" with a rainbow background.)