Ik thus isn't mcoc related but it sort of is. This enables you to have 2 or more apps open at once, which lets you auto fight while watching YouTube or vice versa
Step 1: drag the app up as If you were shutting it and put it into the selection svreen
Step 2: click on the App icon and select the 3rd option
Step 3: adjust to your liking. Hope this helped!

