Add more documentation to Vods

[wolfcomp]

So after a bit of trail and error with no luck on the baseUrl that is given from https://dev.mixer.com/rest/index.html#VOD when you request a vod from the https://dev.mixer.com/rest/index.html#recordings__recording__get or https://dev.mixer.com/rest/index.html#channels__channelId__recordings_get it would be nice to have the actual file names listed in the format explenation of the vod structure as currently there seems to be no documentation on what is the filename or extension.

[wolfcomp]

Actualy after a bit of time i thought about digging into how the vod requests look on the main site. And found the file names that was still sorta unknow to me.

In the picture below i have added in extra text that shows what would be great to implement into the vods part of the document, the one in ????? i dont know the name of and cant realy be bothered to try and find it as currently its 3:54 AM as posting this.