&gt; <i>So, no, webm, VP8, VP9, Google’s new stuff, etc is not &quot;free of patents&quot;, it just happens to have patents which most users don’t notice.</i><p>As I pointed out above, that isn&#x27;t true except in the narrow sense of if you try to sue for the invalidity of the webm patents specifically, and then you&#x27;d lose your license to the webm patents and only the webm patents (never mind that if you tried to argue that a software patent was invalid because all software patents should be invalid the court would throw it out so fast that likely no one would notice what you did).<p>You can object to that narrow clause, but no one ever claimed the project was &quot;free of patents&quot;, just that it was royalty-free and that it includes a patent license grant for any patents covering the code and format.<p>Moreover, as (again) I noted above, <i>every</i> Apache 2.0 licensed project has the same clause, so you have <i>a lot</i> more windmills you should be tilting at right now.