I need a tool that hogs off stock to fix the side of a panel
The tool being used in the video is a Power Planer:



The are normally used on wood to do the same job as hand plane, but they can be used on soft metal like aluminum.

I also found this website which talks about using the tool to clean up the edge of an aluminum panel.  I've never seen this tool used on metal before your question, so I can't tell you much about it.  It seems to me it would ruin the planar knives pretty quickly.

Also, planers like this are only designed to remove at most a 1/16th of an inch of material, and I'm not sure what the max would be on aluminum.