oEmbed Support for tickets/wiki
I would like suggest that oEmbed be added to Redmine content rendering, to be able to embed Videos from major plataforms (youtube, Vimeo, etc), to better render things like Github repository links, Twitter posts and slides from Slideshare, SpeakerDeck, etc.
This will improve ticket reporting capability and will also empower wiki with features that will help create good documenation with multimedia assets rather then just image text and links.
There is already an existing ruby gem that can do the heavy work for us: https://github.com/judofyr/ruby-oembed and all we have to do is extend our text formatting to integrate this library, and white list some trusted oEmbed provider.
There is a side effect that oEmbed content can't be "easily" rendered by existing PDF exporter library, rendering just the links instead of whatever the oEmbed provider decides.