We use a few custom media tags, the most important of which is the ability to display Adobe PDFs inside a post. 

​What are these media tags?

Any idea or post explaining how twitter and/or vine videos can be embedded ? Users demanding this option.

I found out that they are allready enabled if correct URLS are pasted like

https://twitter.com/invisionps/status/578968870934822912

https://vine.co/v/eaE2FI6XXhW

No additional action is needed

Really miss Media Tags  I don't understand why not use the Media Embed plug-in with Iframely — https://iframely.com?

Previously (IPB 3), I used a lot of media tags for different sites — Steam, Bandcamp, Promo DJ, etc. But now — I can't