Currently on most distributions jhbuild build fails because of libwebrtc requiring libvpx 1.10; notably playwright is running into this. The solution here is to pull it in through jhbuild.
Created attachment 432369 [details] patch
Created attachment 432370 [details] patch sorry, uploaded wrong patch
Committed r279325 (239200@main): <https://commits.webkit.org/239200@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 432370 [details].
<rdar://problem/79855210>