Update Markdown Guide - videos
Add how to display other videos (vimeo, GDrive) to markdown guide
cc/ @erica @rebecca @evhoffmann @kirstenabma FYI, as you all do a lot of stuff with videos :)
Btw, the markdown guide is now under /handbook/product/
, not under /handbook/marketing/
Review Apps link: https://update-md-guide-video.about.gitlab.com/handbook/product/technical-writing/markdown-guide/#videos