Note: The key things to know here are that:
To analyze 2 videos:
Select your own Zone and then select the Analyses link.
Then choose Dual Analysis.
Remember if you are just using the free Lite option you will not even see this option.
Then choose your videos from the File Manager that automatically appears.
Remember you need to choose 2 videos.
Note: You can narrow your search by choosing the appropriate Tags or do a search.
You are now on the Dual Analysis screen.
From here you can: