How do I replace the bulb in this headlight assembly?

I replaced a burned-out low beam bulb (H7) in my 2012 Jetta, but when I went to change the other side (driver’s), the assembly was way different from the passenger side (which is what I expected based on tutorial videos). I showed pictures to a family member who suggested it was probably a DIY replacement by the previous owner. What is this assembly and how do I change the bulb?

The first picture is as I found it, and the second is after unplugging it. The plug came off easily, revealing the prongs from the back of the bulb, but nothing else moved easily.