L.E.Sentra

Hi everyone. My brothers 04 max has a weird idle issue. Basically when idling, the rpms will dip/drop and almost stall out (auto trans). Doesn't matter if it's in park or drive, it still dips. Pulled a code and it was p0171, so I replaced the o2 sensor on the rear bank. I also pulled a p0300 but it's not specific to any cylinder. I think it's a coilpack but idk which one.

I just replaced the egr and it still does the same thing.

Here is a quick vid

Any ideas?