I began watching this series today and noticed that the audio was slightly off the video. It isn't terrible like 2 second delay but enough that it is clearly noticeable. I believe it was the entire video but definitely around the 28:00 minute mark. There was even a transition that happened before it should. So far I've only watched the first video in the series, "Getting Ready."
https://www.logos.com/product/412816/street-smarts-video-lectures