WordPress.org

Casper?

Yes, but keep in mind that my wordpress.org username is Caspie.

I want to write you or thank you?

Do it via my blog - http://blog.caspie.net/contact/ - enjoy!

How many videos I can put in the same post or page?

One or more... It's up to you!

How to create my own Fast Tube ThumbView skins?

Activate the plugin and go to the Fast Tube top-level administration menu. Hit the Fast Tube Skins button at the top.