Would be helpful to know which options did you use in order to compile with maven. If you use it as the docs say:
mvn compile exec:exec [your options]
then you are compiling and running your videobridge.
If you want to compile and get an executable and a package containing the jar and its dependencies, you should use
For skipping tests and build from zero:
mvn package -DskipTests -Dassembly.skipAssembly=false
The last one wil generate a directory with its name including the word SNAPSHOT in the name or a targe directory (depends on some settings on the repo). Something like jitsi-videobridge-2.1-SNAPSHOT. Then you’ll need to enter the target directory and there you should find a .jar file and a .zip file. Usually the zip file contains everything you need to run the project. (in the case of the video bridge, you’ll find a file called jvb.sh) which you can execute directly (for testing purposes, if you need it to run in a testing/production enviroment, you need to provide some extra settings like server, hostname, your prosody password, port, etc)…
Are you using Ubuntu/Debian linux distritution? if that’s the case, i recommend that you install jitsi and its dependencies from their repositories, it’s pretty straightforward. If you’re installing in another linux distribution, you can use the docker packages, unless you want it to work the hard way.