No, you don't need to get rid of them, sneezing is normal when excited or in a new environment (even seasonal allergies can make a rat sneeze).

Your rats look healthy and happy from the vid. Just monitor that the sneezing doesnt get worse. Provide a high quality lab block, clean water, don't overcrowd and they'll likely be fine.

Treat them with care, and they will likely clear it up on their own.

Also, the amount of sneezing I heard wasn't terrible. It really could be a number of reason why. Once it gets to be sneezing every few minutes, they are little under the weather and need a little extra something.