Google Sites embedded YouTube videos issue

[czehelein]

Video unavailable on my google sites

I have videos in my google site that are showing video unavailable (I am the owner of the videos, they are nursing skills videos for our college). I tried removing them and adding them back in with no luck. Not all the videos embedded have the "video not available" black screen, just some of them. I've gone as far as removing them from my YouTube channel and re-uploading the video again, I still get the video unavailable. This is driving me cray cray and students need access to the skills videos by next week.

If I create a link to the video the video plays just fine on my YouTube channel, this only happens to embedded videos but not all, I would say about 10% of my embedded videos are getting video unavailable screens. Please help!

Also, when I copy the URL link to the missing videos (right click on dark YouTube video box, I get a https://www.youtubeeducation.com/watch?v=ePQSn94LMAU 

The video address should be https://www.youtube.com/watch?v=ePQSn94LMAU 

Why is it