I'm following this guideline on setting up droidcam so I can use my android phone as a webcam, the first two scripts run okay but when I run sudo apt-get update there's an error related to the installation
E: Failed to fetch http://ppa.launchpad.net/paolorotolo/droidcam/ubuntu/dists/xenial/main/binary-amd64/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.