Youtube video will not play on my mac

I am a teacher, and I often use prezi in my classroom.

About a year ago, I created an entire unit using Prezi, with a video component used in almost every presentation. I am about to begin the unit again, but it seems that some videos are refusing to cooperate. Most presentations are fine, but the videos in the first presentation of the unit will not play, and remain static images, regardless of which browser I use, how many times I try re-entering the videos, or where I begin the presentation.

All videos have worked fine, on multiple occasions, but seem unable to work now. The videos will also not work in other presentations, or in newly created presentations. Please help!!

Here is a link to the presentation: When the presentation first loads the video looks fine, and includes an image from Youtube. Then, the presentation seems to glitch and reload, after which the video appears as a static image. Does the YouTube video work outside of Prezi?

Your school security controls might be blocking it. First try using a different browser. If this doesn't help, try installing adobe flash with Homebrew cask. Homebrew has solved all my long standing flash update issues. Install Homebrew, and then: You can find Homebrew and brew cask by simply searching for them on google.

Youtube says my version of Safari is no longer supported. I am going with your comment that says: Allan Allan Tetsujin Tetsujin Sign up or log in Sign up using Google.

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