Chrome Version: 65.0.3325.18
MR: 6518.129.0.0
OS: Mac

This is a semi-reliable repro using the following steps.

Note that media remoting was on and may or may not be a part of the repro.

What steps will reproduce the problem?
(1) Go to a Vimeo video in Chrome and cast the tab to a Chromecast device. e.g. https://vimeo.com/193381596
(2) Once the tab is being mirrored on the Chromecast device, click on the fullscreen button in the video player.
(3) The fullscreen-in-tab feature is triggered.
(4) resize the browser window horizontally. (enlarge, shrink, I'm not sure which triggers it)
(5) Click on the fullscreen button in the video player to exit fullscreen-in-tab.

What is the expected result? Part of the top of the video should not be hidden.

What happens instead? A portion of the top of the video is hidden / cut off. Even if you scroll all the way up on the page, the top of the video is still hidden. It is impossible to see the heart icon on the player.

I could not repro this on abc.com or youtube.com videos. But it happens intermittently so I can't be 100% sure it wouldn't.