Let us write the PGKBUILD ourselves.

We download the snapshot of the latest vivaldi-codecs-ffmpeg-extra-bin.

We extract it and this will be our ‘playground’. We will change the pkgbuild here.

Then we go and surf to the source to see what is there. We need to find a NEW VERSION.

We analyze and change the PKGBUILD and try to run it with : makepkg

I did not see the word “extra” in the name of the file therefor I need to make a new md5sum. After looking at the video that is quite clear now.

Then we install the build package with

General Package Building Information

On the AUR you will find thousands of PKGBUILDS.
You can use their PKGBUILDS or make one yourself.

AUR = Arch User Repository - A user is someone like you and me.

Here are some interesting links if you want to make your own 'recipe' or PKGBUILD.