Support shopify hosted video in video section

[kmeleta]

Add support for shopify hosted video (via video setting type) to existing video section.

https://www.figma.com/file/hQiYDulTbQCKxBqIbtCpWZ/Multirow-and-Shopify-hosted-video-explorations?node-id=610%3A23896&t=u195pyrwPwLIjTFE-0

Edit: Updated settings content

[bredowmax]

May be related to #1687

[danielvan]

@kmeleta, we had some feedback around the settings order and definition here. I've built an example image with the rationale behind the choices and our desired approach. Let me know if it works, or if you'd like align.

Image

cc @katycobb

[kmeleta]

Content decisions have changed. Aligned with Dan, Melissa, and Katy on these decisions (slack thread), at least until applicable bugs/behaviors in the video url setting are resolved.

Updated settings/content