HTML Video Format Play Support Per Browser I couldn't find a handy chart of this. This was a quick test based on a single video. Tested on 2019-01-31 Browser/version mp4 ogg webm Chrome/71 ✅ ✅ ✅ Firefox/64 ✅ ✅ ✅ Safari/12 ✅ 🚫 🚫 iOS 12 Mobile Chrome ✅ 🚫 🚫 iOS 12 Mobile Safari ✅ 🚫 🚫