Great job looking for users to test your product!

That's an important first step.

Since you're theme is created for a very specific purpose (video gallery publication), I would recommend learning about your target market and find out where they hang out.

Are there specific forums? Facebook groups? What type of person would like to use your theme?

Once you find them, offer them your theme to test it out. Yes, feedback from experts is important (that's what Clarity is here for) but you also want feedback from the average user.

If the average user in your target market can't use your theme, you're toast. So find them and get some help.

You got this!