Not according to all the information discussed in the other comments.

> most of the circulation he's stuck in looks to be horizontal

This section has up to 60m depth, the underwater currents are extremely turbulent and will you pull you under the rock on the sides (the whitewater is just a 'slit' on the surface, there's a whole river running underneath). If he didn't have someone ready to pull him out in two seconds like in the video, it's a good bet he wouldn't make it out.