So I took the brace off and found no sign of leakage. Just smelled fumes. I'll get to that later, as you can see on the video below all the wet spots are at the bottom. On some parts it seems gas has found its way there but when inspecting the area where the fuel filter is I saw no alarms there.

I do see that my tranny is leaking some oil however I don't know where it's coming from. Any suggestions? On both issues? Good thing I didn't buy all the parts to replace:)

My s4 had a fuel leak at the back. You could only see it when the car was running. It was at the fuel pump. New crush washers fixed it.

I'm not much help on the fuel smell, but I bet most of the moisture and grease is from the CV joints. Twice, I had a new boot come loose and grease was everywhere. I recommend you tackle those cv joints as soon as possible as they are some open to grit and debris. If you don't clean and regrease them soon, you may have to replace the joints as well as the boots. .

Those cracked boots make a mess when the grease flies out. Dwayne has a page on refurbing them. Or, you can buy already refurbed ones.

For the gas leak/smell, I would jump the fuel pump relay so the pump runs while the battery is connected. Then hop back down there and wipe your fingers over the fuel pump and filter joints and see if it feels wet or if your fingers smell like gas. To me it looks like it might be something as simple as a loose fitting and gas is running down the cover. Hard to tell from your video tho. I had to tighten the banjo bolt on mine earlier this week. It was dripping a drop every 30 seconds or so.