Video works on chrome, but not on Android App!

[Enissay]

@Venson,

In details:
Works wellell: the video works fine as expected on chrome only
Not working: 2 cases here:
+ on android tablet, I get a green screen, but I can hear audio
+ on firestick, I get nothing but an error



Checking Jellyfin log, I see the below:

Code:

ffmpeg version 5.1.3-Jellyfin Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 11 (Ubuntu 11.4.0-1ubuntu1~22.04)
  configuration: --prefix=/usr/lib/jellyfin-ffmpeg --target-os=linux --extra-libs=-lfftw3f --extra-version=Jellyfin --disable-doc --disable-ffplay --disable-ptx-compression --disable-static --disable-libxcb --disable-sdl2 --disable-xlib --enable-lto --enable-gpl --enable-version3 --enable-shared --enable-gmp --enable-gnutls --enable-chromaprint --enable-libdrm --enable-libass --enable-libfreetype --enable-libfribidi --enable-libfontconfig --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libopenmpt --enable-libdav1d --enable-libwebp --enable-libvpx --enable-libx264 --enable-libx265 --enable-libzvbi --enable-libzimg --enable-libfdk-aac --toolchain=hardened --enable-cross-compile --arch=arm64 --cross-prefix=/usr/bin/aarch64-linux-gnu-
  libavutil      57. 28.100 / 57. 28.100
  libavcodec    59. 37.100 / 59. 37.100
  libavformat    59. 27.100 / 59. 27.100
  libavdevice    59.  7.100 / 59.  7.100
  libavfilter    8. 44.100 /  8. 44.100
  libswscale      6.  7.100 /  6.  7.100
  libswresample  4.  7.100 /  4.  7.100
  libpostproc    56.  6.100 / 56.  6.100
Input #0, matroska,webm, from 'file:/mnt/video/blah.mkv':
  Metadata:
    encoder        : libebml v1.3.0 + libmatroska v1.4.1
    creation_time  : 2014-09-11T06:11:20.000000Z
  Duration: 00:29:16.04, start: 0.000000, bitrate: 3574 kb/s
  Stream #0:0: Video: h264 (High 10), yuv420p10le(progressive), 688x564 [SAR 12:11 DAR 688:517], SAR 47:43 DAR 4:3, 50 fps, 50 tbr, 1k tbn (default)
  Stream #0:1: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s (default)
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (h264_v4l2m2m))
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
[h264_v4l2m2m @ 0x55b5760620] Could not find a valid device
[h264_v4l2m2m @ 0x55b5760620] can't configure encoder
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
Conversion failed!