I have to go with MOPAROFFICIAL on fan in the shroud, The only way the air can come back out the rad is if you have to much fan is in the shroud. The air coming off the end of the blades has no where to go because the shroud is in the way, It's hard to tell from the vid is there a spacer between the fan and pump if so pull it out and trim the shroud to fit tighter against the rad fill the gaps and see what happens
