Não é uma resposta, mas um comentário estendido.
O youtube-dl tem muitas dependências:
$ sudo apt install youtube-dl
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
ffmpeg libavdevice57 libdc1394-22 libdouble-conversion1 libopenal-data libopenal1 libqt5core5a libqt5dbus5 libqt5gui5
libqt5network5 libqt5positioning5 libqt5printsupport5 libqt5qml5 libqt5quick5 libqt5sensors5 libqt5svg5 libqt5webchannel5
libqt5webkit5 libqt5widgets5 libsdl2-2.0-0 libsndio6.1 libuchardet0 libxcb-xinerama0 mpv phantomjs python3-pyxattr
qt5-gtk-platformtheme qttranslations5-l10n rtmpdump
Suggested packages:
ffmpeg-doc libportaudio2 qt5-image-formats-plugins qtwayland5 qt5-qmltooling-plugins sndiod python3-pyxattr-dbg
python-pyxattr-doc
The following NEW packages will be installed:
ffmpeg libavdevice57 libdc1394-22 libdouble-conversion1 libopenal-data libopenal1 libqt5core5a libqt5dbus5 libqt5gui5
libqt5network5 libqt5positioning5 libqt5printsupport5 libqt5qml5 libqt5quick5 libqt5sensors5 libqt5svg5 libqt5webchannel5
libqt5webkit5 libqt5widgets5 libsdl2-2.0-0 libsndio6.1 libuchardet0 libxcb-xinerama0 mpv phantomjs python3-pyxattr
qt5-gtk-platformtheme qttranslations5-l10n rtmpdump youtube-dl
0 upgraded, 30 newly installed, 0 to remove and 11 not upgraded.
Need to get 28.8 MB of archives.
After this operation, 114 MB of additional disk space will be used.
Do you want to continue? [Y/n]
São algumas bibliotecas que precisam ser compiladas para a arquitetura desse pequeno dispositivo.