The problem was only happening with AVC1, based on what I observed, VP9 videos were working just fine…
But I could be wrong about this, as I didn’t test it properly, this is just a fast observation, then rapidly installed 4.4… So couldn’t test further…
Okay i see that. I wasn’t having any issues with video but i didn’t have the updates yet either. It’s all working for me.
Seems they just updated the other version. 
[ricklinux@eos-kde ~]$ yay
[sudo] password for ricklinux:
:: Synchronizing package databases...
core is up to date
extra 1542.9 KiB 6.55 MiB/s 00:00 [---------------------------------------------------------------------------] 100%
community 6.1 MiB 19.1 MiB/s 00:00 [---------------------------------------------------------------------------] 100%
multilib is up to date
endeavouros 28.2 KiB 44.0 KiB/s 00:01 [---------------------------------------------------------------------------] 100%
:: Starting full system upgrade...
resolving dependencies...
looking for conflicting packages...
Package (2) Old Version New Version Net Change Download Size
extra/ffmpeg 2:5.0-3 2:5.0-4 0.01 MiB 10.69 MiB
community/vmaf 1.5.3-1 2.3.0-1 1.94 MiB 0.40 MiB
Total Download Size: 11.09 MiB
Total Installed Size: 41.50 MiB
Net Upgrade Size: 1.95 MiB
:: Proceed with installation? [Y/n]
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