The toolbar icon in the MVP looks as follows

which
So what I proposed is a trade鈥搊ff between the semantics of the feature (media embed is more than videos) and commonly used patterns (media is mostly videos these days).
There's also the matter of limited space in the icon and the fact that we shouldn't overdo it which makes it hard to express the entire scope of the feature (a.k.a. "embed almost anything"). IMO in v4 we made a poor job depicting the feature

This icon is very vague and I'd rather avoid this kind of communication. I think an incomplete but precise communication is way better than that.
WDYT?
cc @dkonopka
In my opinion, there is no way to make 100% clear icon in this case, because like you said, it can be "everything" like Twitter, Google Maps, Reddit and hundreds of various type of content.
I definitely prefer much more the current icon than v4 (it looks like an article or some kind of note?) and I'd stay with "video icon" 馃憤
:+1: for the current icon. It is far more natural than the icon in CKE4.
Most helpful comment
:+1: for the current icon. It is far more natural than the icon in CKE4.