Cannot use the hardware codec when playing video

[kit20a]

Raspberry Pi 4B (8GB) + radiator + Сooler Noctua => stress test cpu = 43-45 C
Power supply = reliable with ample current capacity
MX Linux last
`glxinfo -B

name of display: :0.0
display: :0 screen: 0
direct rendering: Yes
Extended renderer info (GLX_MESA_query_renderer):
Vendor: Broadcom (0x14e4)
Device: V3D 4.2.14.0 (0xffffffff)
Version: 24.2.8
Accelerated: yes
Video memory: 7393MB
Unified memory: yes
Preferred profile: core (0x1)
Max core profile version: 3.1
Max compat profile version: 3.1
Max GLES1 profile version: 1.1
Max GLES[23] profile version: 3.1
OpenGL vendor string: Broadcom
OpenGL renderer string: V3D 4.2.14.0
OpenGL core profile version string: 3.1 Mesa 24.2.8-1~bpo12+rpt4
OpenGL core profile shading language version string: 1.40
OpenGL core profile context flags: (none)

OpenGL version string: 3.1 Mesa 24.2.8-1~bpo12+rpt4
OpenGL shading language version string: 1.40
OpenGL context flags: (none)

OpenGL ES profile version string: OpenGL ES 3.1 Mesa 24.2.8-1~bpo12+rpt4
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.10
`
Raspberry Pi configuration file
config.txt (attached)

When playing a video, for example from YouTube in Thorium, the decoder section is empty chrome://gpu
It appears to play any video using software decoding, bypassing the hardware codec. All four cores are running at 60% capacity

thorium.txt

config[RPi4][overburn][work].txt

• The output command is empty

sudo v4l2-ctl -d /dev/video11 --stream-mmap=3 --stream-count=1
or
sudo lsof -c thorium-browser 2>/dev/null | grep "/dev/video"
or
sudo v4l2-ctl -d /dev/video11 --stream-mmap=3 --stream-count=10 2>&1 | head -20

Here's an example of chrome://gpu for Chromium,
but it doesn't use hardware-accelerated video playback either—only software-based.

chromium.txt