Someone recently send me a link to the Broadcom Crystal HD bcm70012. It is a hardware decoder card for H254 video.
Is this compatible with LibreElec?
It was supported in the mk1 AppleTV images that I used to create (2011-2016 in OpenELEC days) but support in Kodi was dropped in Kodi Krypton (v17) and there are no plans to resurrect that or restore support in LE images.