Action name record when image tracking method is Used

Hello,

I am using image tracker to track certain event like clicking a particular video.
I am giving video title as my actionname value. Following is the code:

where in the dashboard this action name will be recorded…?

Also how to implement custom variable in the above code instead of action name. The syntax given in the documentation was not clear for me.

So please answer the above questions as soon as possible.

Thanks,
Rakesh.N