Those Binary blobs are related to ATI and the HDMI DRM bs that @gbryant talked about in his last video. In Debian, the
firmware-amd-graphics packages will install these blobs. The Debian devs have purposefully removed these blobs as they are considered bugs since the Debian philosophy is to allow users the choice of installing proprietary software. As a result of this philosophy, all proprietary software is removed by default unless it slips by unknowingly and the
non-free repos aren't enabled. Without the
firmware-amd-graphics package, displays will not go above 420p resolution (here I speak from experience) and as the Debian Wiki puts it
Without this package installed, poor 2D/3D performance in the radeon driver is commonly experienced. Some GPUs may require firmware to operate the X Window System, or do dual display.
I say all of this because many people believe that AMD is better than Nvidia because of their open sourced drivers. However, with noveau, I get minimal to no problems with HD resolution or output over DP. Therefore, Nvidia has enabled me to be able to run my Debian installation with nearly complete software freedom whereas Amd's free driver is somewhat more restrictive that Nvidia's. As a a matter of fact, I have been able to use Debian more often that Pop_OS lately (I dual boot where Pop_OS has all my proprietary software and firmware blobs).