I've been playing with idea today. Got it working in principal, but not yet as smoothly as I'd have liked. I wanted to create a 'Tweet Wall' that would show a cycling series of tweets during an event.

Here's what I did:

1. Created a social title.
2. Output it over NDI.
3. Brought the NDI feed back in as an input.
4. Added a video delay for the new NDI input at the same time as the vMix Social refresh rate.
5. Over a blank input or image background use the MultiView to move the delayed NDI feed so it doesn't cover the original.
6. Bring that same title OP NDI feed in again, double the video delay.
7. Repeat step 5.

vMix Social must have the 'Repeat Tweets' box checked.

Hope that points you in the right direction. Be great to hear how you get on.

Kevin