There are several ways to loop a clip, but here a very simple one

Compositing fog elements seems like a pretty straightforward thing to do in After Effects. Shoot or render your fog element against black, and then Add or Screen it on top of your footage, right? Wrong. This method is incorrect. Let's go over why.

The interpret footage window isn't fast when we have lot of footages in the project to check...

This script will allow you to select one or more layers and create a solid, choose the color and place it directly below the footage layer and it will trim the in and out points of the new solid to match the footage duration.

Convert frame rates from PAL to NTSC to PAL.
Change 60i footage to 24p and much more.

This script aligns the selected layers along the x, y or z axis.

The Difference Matte effect creates a transparency a mask or a matte by comparing the pixels in a source layer with the pixel in a defined difference layer, and then keying out (eliminating) pixels in the source layer that match both the position and color in the difference layer.

This is a preset that you can use on green screen footage or just general compositing.

iPad like animation transitions for layers or comps. It's included in-out transitions.

Bake properties with detection of gaps and linear interpolation.