You are running into the issue mentioned here: Twitch Embedded Player Migration - Timeline Update
This is due to a change in modern browsers, but you’ll be able to get around it by following the advice here: Twitch Embedded Player Updates in 2020
You are running into the issue mentioned here: Twitch Embedded Player Migration - Timeline Update
This is due to a change in modern browsers, but you’ll be able to get around it by following the advice here: Twitch Embedded Player Updates in 2020