Software can now be call proprietary?
pro·pri·e·tar·y : of or relating to an owner or ownership.
So what is this guys saying. That now anything with a company behind is is proprietary? Linux has got LMI, so I guess that's proprietary, and firefox has got Mozilla. Libreoffice...by this guys twisted version of reality, what is not proprietary?
VP8 was published as an informational RFC under the IETF, but not as part of a standards track, see "Not All RFCs are Standards": https://tools.ietf.org/html/rfc1796
It also took a full year after Google bought the company behind VP8 to actually release the code. Someone from Firefox actually wrote an open letter to Google basically asking WTF was going on.
I don't have any first or even second hand knowledge of the current situation, but I suspect that Google has continued to ... not collaborate as much as everyone else would like.
(Caveat emptor: the above is based off of memory of events that took place a few years ago.)