This is present on iOS/iPadOS 15.7 but not on desktop versions of Safari. When seeking in a livestream, the value returned by video.getStartDate() is inconsistent. You can see it on this page here: https://is.gd/iwokev And you can log the values with this: const video = window.embeddedMedia.players[0].toucan.playbackController.currentPlayback.videoElement; video.addEventListener("timeupdate", () => {console.log("timeupdate", video.currentTime, video.getStartDate().getTime()/1000)}); video.addEventListener("seeking", () => {console.log("seeking", video.currentTime, video.getStartDate().getTime()/1000)}); video.addEventListener("seeked", () => {console.log("seeked", video.currentTime, video.getStartDate().getTime()/1000)}); When seeking on the player, we can see the startDate jump around randomly, here from 1664276072 to 1664272274: [Log] timeupdate – 7192.9013990300045 – 1664276072 [Log] timeupdate – 7192.902806654998 – 1664276072 [Log] seeking – 3394.9170031547546 – 1664276072 [Log] timeupdate – 3394.9170031547546 – 1664272274 [Log] timeupdate – 3394.9249128916604 – 1664272274 [Log] seeked – 3394.9268130166643 – 1664272274 [Log] timeupdate – 3394.9336368916743 – 1664276072 [Log] timeupdate – 3394.9364625166677 – 1664276072 [Log] timeupdate – 3394.8134785423435 – 1664276072