We have actually resorted to using a Mac and a "ScanDo" to pipe the Mac's rendition of the social post as a video input either directly (full screen) or into XPression as a video texture. The problems with doing this in Xpression are far reaching, including that every device renders emojis differently. You could maybe do it more easily by capturing the output of a browser as a texture, but you wouldn't get video.
#XPression