Where can I find this video?

I'm adding my comments because the accepted answer does not address OP's question.

This image is part of the photo gallery released by Vivid for Gia: Portrait Of A Pornstar, the male performer is Ariel King and the female performer is Sunny Leone:

https://www.adultdvdempire.com/605/gallery.html

Yet. the images do not translate to any scene in the movie.

Here's some possible unconfirmed reasons:
- This scene was cut from the DVD, or the company lost it after releasing promotional material
- It's a bonus scene or extra material hidden on the DVD, which are sometimes neglected by adult dvd websites

Sorry OP, if it's the former then you're out of luck. if it's the latter, you'll need to get your hands on the DVD (or ISO) of Gia: Portrait Of A Pornstar and check it.

I'm adding my comments because the accepted answer does not address OP's question.

This image is part of the photo gallery released by Vivid for Gia: Portrait Of A Pornstar, the male performer is Ariel King and the female performer is Sunny Leone:

https://www.adultdvdempire.com/605/gallery.html

Yet. the images do not translate to any scene in the movie.

Here's some possible unconfirmed reasons:
- This scene was cut from the DVD, or the company lost it after releasing promotional material
- It's a bonus scene or extra material hidden on the DVD, which are sometimes neglected by adult dvd websites

Sorry OP, if it's the former then you're out of luck. if it's the latter, you'll need to get your hands on the DVD (or ISO) of Gia: Portrait Of A Pornstar and check it.

Sunny Leone and Ariel King
This is clearly from her site, and this link (http://www.addictiveteens.com/1009/sunny-leone-gets-fucked-hard/) of a partial gallery also leads back to her site . But there are no male/female videos that I can find on the free side, sorry I have hit a dead end.