YouTube video views are important to all members of the YouTube community – both to uploaders, as well as viewers. Views reflect how many times a video is watched and are an important measure of a video's overall popularity.
This is why we need to verify video views and it takes a bit of time to do so. You will notice the delay caused by the validation process once the video has at least 300 views. At this point, the viewcount may slow or temporarily freeze until we have time to verify that all further views are legitimate.
During the time in which the viewcount appears frozen, valid views will continue to be counted.