this website uses google drive to store videos online, however google drive video playback seems to be broken for safari. this is a problem on google's side so there's nothing i can do. :(

workarounds:

• click the pop out (or open in new tab) button on the top right corner of the video player (see image). this will bring you to the google drive website where the video can be played.

OR

• (not recommended) use an alternative browser, such as chrome.

OR

• (not recommended) turn off prevent cross-site tracking on safari under safari preferences > privacy (AVOID DOING THIS as it allows for ad tracking, etc, on other websites).