I’m not an attorney. That

I’m not an attorney. That said, I believe here in the U.S. you would be crossing a legal line. The video you have created would be considered “work for hire” and thus the property of your boss. You could not use it as your own without his/her permission.

Since examples of your work are readily available on line, why not simply indicate this in your resume? No need for examples on your website; a link to the material would be entirely adequate. That’s the beauty of the web!