I will be adding more information as I learn more. This is a summary of the knowledge on the subject I have gained so far. Wayback machine This is an obvious go-to website where you can see historic versions of sites. It is run by Internet Archive non-profit digital library. https://archive.org/web/ Google cache You can see cached version of sites in Google search by clicking the little down-arrow next to the URL.
I needed to run Stadia on a Libreboot laptop which runs entirely free software. This includes Chromium, which meeans, that I have to use VP9 codec in Stadia to even make it work. Otherwisee it would not work.