I didn't watch the video (I have better uses for my limited internet download capacity) but I see it's the Reese Sidewinder. This is a bit obscure, but has been around for a while and has been discussed in EscapeForum before.
Bob posted the same video in Towing escape 5.0 with Toyota tundra
, and it was mentioned as Reese's solution for short-bed trucks in 5.0TA with 2015 F150 2.7L 5.5ft bed
. As I mentioned in the first of those discussions, I wouldn't use it, but it is obviously widely used with larger trucks and trailers.
This is a thousand-dollar accessory weighing 140 pounds or more (although it replaces the lower part of the pin box, compensating for some of that weight). The eTrailer page
gives some details.