No. Here's the license. https://www.webmproject.org/license/additional/

You only lose the right to use WebM parents if you file litigation against any user of WebM (not just Google) over any implementation of WebM. You can sue Google about anything else and not suffer WebM license consequences.

You're probably thinking of Facebook's open source patent rider. https://github.com/facebook/react/blob/master/PATENTS

Indeed, turns out, I was wrong on that. Now I wonder, if i own MPEG patents, could I sue Google for misuse of them, while licensing WebM? There’s quite some overlap with them.

And yes, Facebook and Tesla’s patent licenses are completely ridiculous.

You can sue Google about misuse of MPEG patents and keep your protections under the WebM license, so long as you do not sue Google or anybody else about WebM's patents.

> basically requires you to share all your patents with Google if you use VP8 and VP9

Do you have a link to the license which says you must share all your patents with Google?

It turns out Google removed the "you lose the right to the license if you sue Google for literally anything" part, but Facebook still has it in React, and Tesla has it in their licenses.

That’s the usual wording of these clauses, and the problem.