It looks like a scythe ninja 3000 or 3100. I don't know if the 3000 is available anymore, the 3100 is from some places. Even the 3100 is a bit older, both coolers were from around 2010-2011. Newegg shows the 3100 at around $99 which I believe is overpriced but from a 3rd party seller rather than newegg themselves. It may be difficult to find either, scythe has released a newer model called a fuma though it's not the same as the one in that video. It looks more like the standard upper end air coolers like the noctua nh-d14, phanteks tc14pe etc with dual fans and twin cooling towers.
There's also the ninja 4 which looks more similar to the ninja 3 but not exactly. The spaces in the fin stacks don't create and 'X' shape, more like a "+"...