Linux Releases

Option 1 - Flathub

flatpak install flathub com.obsproject.Studio.Plugin.DroidCam

Option 2 - Manual Install via zip file

The DroidCam plugin releases are made to be generic and mostly self contained. The main dependency is ffmpeg.

FFMpeg-4 - Ubuntu 20.04 (Focal) / Ubuntu 22.04 (Jammy)
DroidCam OBS Plugin v1.5.1
DroidCam OBS Plugin v2.1.0

FFMpeg-5 - Ubuntu 22.10 (Kinetic) / Fedora 36 / latest Flatpak
DroidCam OBS Plugin v2.0.1
DroidCam OBS Plugin v2.1.0

Other distros: check which FFMpeg version your system is using, and download accordingly.
Specifically, it is the libavcodec package that matters:
libavcodec58 == ffmpeg-4
libavcodec59 == ffmpeg-5

Consult the README.TXT in the download zip on how to install.