The media source value is represented in the tracking link, on the bottom of the page, under the ‘pid’ parameter. Note To properly differentiate between your custom tracking link and AppsFlyer integrated partners tracking link, do not use "Facebook", "Facebook Ads", "Google", "Twitter" or "Organic" as your custom media source name (case insensitive). At that time, Google will completely disable the URL shortener and all associated data will be lost.
Short.cm has integration with many statistics services (like google analytics and mixpanel) through segment.io API. URL shorteners typically work by redirecting users using a special server response commonly referred to as a "301." This tells the browser that the resource at your short URL has been permenantly moved to the full URL's location. To use custom campaigns, you add UTM parameters to your URL which are then recorded in your custom analytics report.
Yourls is a way to homebrew your own shortened links so that you don’t have to rely on that middleman. At that time, Google will completely disable the URL shortener and all associated data will be lost. Owned Media email and SMS campaigns, web site banners and landing pages, viral posts on social media or even QR codes on physical posters. See if you are using Classic Analytics (ga.js) or Universal Analytics (analytics.js).