Adding %author% in custom post type URL structure?

I’m trying to do some WordPress URL rewriting …

Specifically I have custom post type that currently works like this:

http://mydomain.com/videos/post-title/

But I would like to have it located at:

http://mydomain.com/videos/author-name/post-title/

Is there any way to achieve this?

using Jhon’s Custom Post Permalinks plugin it should be easy
using:

/%post_type%/%author%/%postname%/