Typically the project will offer its own deb repos and packages along with setup instructions such as steam or docker
In theory you can add LMDE or other debian based distros repos to your sources but it will most likely lead to things breaking. If you cant find instructions specific to debian then you are better off either compiling from source or using snap, appimage or whatever pre-compiled option is offered officially.
Dems are gonna call this a huge victory, of course they need more funding, they have to pay for more body cams.