Add RecordVideo docs

[vwxyzjn]

No description provided.

[jkterry1]

Hey, we're trying to go more for the homogenous style of showing the function, including a blurb and listing what each argument does than having examples for each method. Would you mind restructuring this a little for that structure?

[vwxyzjn]

This is also related to #2327. @tristandeleu seems to have used RSTs for the documentation probably for auto documentation generation via Sphinx. Is there an instruction for building documentation via Sphinx?

[vwxyzjn]

@jkterry1 do you have an example?

[jkterry1]

We aren't going to be doing documentation remotely resembling how tristan did his and I didn't get a chance to reply to his PR yet (#2276). Filling out the file as is going to be the best way to add docs; during the final merge Kyle will cleanup any problems that exist.

[jkterry1]

I'll deal with this as the website is closer to being released

[jkterry1]

I'm merging this now and I'll go through and fix style things myself when I do the big docs refactor, god willing in a couple of weeks.