Google Search, for some videos, allows you to click an expand icon on some videos it shows you in the search results. That expand button will then overlay a larger playable video with more details.
I think this is new, Punit said it is a test, but it seems to be fully live for me, he shared some examples on Twitter, which I will embed below.
Here is what the expand icon looks like:
When you click on it, it overlays this on top of the search results:
Here are the videocasts from Punit:
Google Testing new video browser to watch video. pic.twitter.com/Hxenbaoy2f
— Punit (@Punit6008) November 2, 2022
Google has done video overlays in search before, many and many times.
Forum discussion at Twitter.