Hmm i refreshed several tines. I’m looking at the list page in safari https://image.nostr.build/a566467806fcc5788c70fe8cf9f04aa9be9e47c3c175019bac5b8179de1fb3a3.jpg
Does the video play if you open the post w/ empty preview? I see your previews just fine in Safari. Maybe try cleaning the website data/cache and retry? Thanks! https://i.nostr.build/o0MERHZOm5Tn2c7P.jpg