Can you please provide us with a full spec of your computer and if you have other extensions than the default ones? Can you also open a fresh browser(with only the new tab opened) and go to chrome://media-internals. After that open that video in a different tab, play the video, and return to the media-internals page and identify the player from youtube and click it. After that, please make a screenshot( or more if needed) of all the information displayed there? Also did you had problems with other videos? Or is this the only one?
If you’re refering to the old chromium style before Material design 2, you can still revert to the old tabs using chrome://flags and choose “normal” on “UI Layout for the browser’s top chrome”