sudo apt-get install droidcam
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package droidcam
How to install Droidcam client for Ubuntu 16.04 LTS?
sudo apt-get install droidcam
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package droidcam
How to install Droidcam client for Ubuntu 16.04 LTS?
Droidcam isn't available for Ubuntu 16.04 and probably never will be because it hasn't been updated since almost 2 years ago.
Up to Ubuntu 15.04 you could have used this instructions.
Since Droidcam isn't currently available for 16.04 and has a number of unresolved issues, Smartcam is an alternative that you might find useful: If you must have Droidcam you could consider running 12.04 or 14.04 instead but it seems it's not compatible with the current Android version so I'd give it a pass.
Note that there is a Stack Exchange site designed expressly for Software Recommendations that you might occasionally find useful.