Average view duration over 15 minutes ?(PPD)

hi , i see on youtube a video niche with 15 minutes average view duration , this video is 2 minutes length, 17k views and time watched 192 days, added 3 week ago.
How is possible that high retention ?

He used script to send webrequest, so he put higher retention (endtime).
Chances to get banned are higher for it.