If you or a student is receiving a circle with and ! in the center, the video is being blocked due to YouTube's policy.
You can review all of YouTube's policies for content here: https://www.youtube.com/about/policies/#community-guidelines
In 2019, YouTube added a policy that blocks gmail accounts associated with k12 from accessing content. You can learn more about this block here: https://support.google.com/accounts/answer/9377793
Since this block is administered by YouTube, IT has no way to work around the block.