I believe it's a HLS video. If you're on Windows, Edge has support for HLS. Otherwise, you'll have to resort to using a media player.

There's a Chrome extension that allows you to see the videos: https://chrome.google.com/webstore/detail/wwdchrome/lohmkcog...

Apple's streams are playable by mpv, mplayer2, VLC, and any ffmpeg-based player. You don't need Safari, just a player that supports HLS.