I've seen Daniel Madison do this on a few videos.
It's kind of like a table riffle. But the ends of the two packets are lifted and they're lightly pressed together.
What is this shuffle called and where can I learn it?
You can see it here at 0:49
https://www.youtube.com/watch?v=XKdr9GaVBvg

Click here to view attached image.

It looks to be what is known as a tabled faro shuffle.
You can find information and videos on it by searching under that name. But see if you can find a demo video online to make sure it is exactly what you want.
Some cards work better for this flourish than others.
This Allan Ackerman DVD:
Advanced Card Control Series Vol 6: The Faro Shuffle
lists the tabled faro as one of the items he teaches.

----- Amado "Sonny" Narvaez

I watched a few videos on the tabled faro and it looks different. The thumbs shown here are on the corner. The tabled faro show them placed along the long end of the deck.

Dan and Dave Buck dvd set "Trilogy" has the tutorial of this table faro shuffle.
You should check it out.

- Arthur

Hmm... Been meaning to rewatch the Trilogy. I'll definitely check it out soon. Thanks.

It's taught in Expert Card Technique.