OverviewUser is trying to figure out what type of traffic is showing up in the dashboard or realtime monitor as "Other". Doesn't have the specific traffic added as an object of any type yet.
If looking at main dashboard page and group "Other" reporting usage, you need to find what application group is causing usage.
Go into Monitor -> Application Groups -> Select "Other" from the Top 30 Inbound Application Groups list -> This will show what application is using up the most traffic defined under "Other" Application.
If you want to monitor the specific application, Example - Youtube, You need to create a new Application Group and Enable monitoring:
Go into config -> Applications -> Application Groups tab -> Add New Application Group: name it what you want to see in the monitor, choose application to match, ex Youtube.
Verify on this page that the new application group is in the list, and that it has a green checkbox indicating it's being monitored. It will now show up on your monitor page under the application group name you specified.