I did some investigating and it seems the video possibly comes from some twitter account that logos there videos with BPA in the top corner. Which conveniently in the op is blurred as well, most likely to keep ppl from accessing the full vid other than through them.
I say it comes from twitter because i got a trail leading to monsnode, a twitter vid dl tool as well as a korean porn site titling it as a twitter short video. However, The page it came from was either deleted or the video itself was, as i couldnt find the source of it.
This is the best image i could find of the possible full video, the original seems to have been flipped so i added a flipped version, which may be closer to the original. Notice the bpa logo, im not sure if it is an acronym or not.
Edit: there may be various versions of the op video as well, as the facial blurring is different on the korean porn site than the others.