Adobe After Effects how can you create a distorted line moving along a video / picture? Example given in desc Saw this on youtube and i would really appreciate if if anyone could explain to me how to do it- The youtube video is below and the distorted libne is in the intro:


  
                
            


Thanks,
I've tried looking around for help but cant seem to find any.
You can duplicate your footage and add a displacement map as your revealer with a black line with gradient