Is It a Thumb Nail Change on Youtube?

The video was at 18 thousand views or so, and it had been that way for the best part of two weeks. In 11 days, it got like 75 thousand views. The problem is, i don't know really truly what's causing the effect. I think people have the idea in their head, because i think netflix does this, that changing the thumb nails on youtube is like tricking people who have already seen the thing into thinking its something new and watching it. But i say, on youtube, looking at the analytics, the analytics do not support that as what has actually occurred.