Yep,
totally agree that nothing you are doing looks unsafe. You can't be too far off.
Speed control on final appears to be your biggest issue. Get that sorted and your approaches will follow suit.
You mentioned in one post about targetting 300 fpm descent on final. That's a new one for me. Your aim point and airspeed are the most important items when on final.
5 mile circuits at MB.... eeek. Almost standard procedure there due to some of the sausage factories.
There are ways to deal with it. The simplest is just slow down on downwind. Select 2200 rpm and let the guy flying the 5er get ahead of you, even if you are flying inside him. By slowing down that little bit, you'll be able to fly your 3miler and remain behind him. You'll be surprised how far behind him you will get on one circuit alone, but you'll undo that with a 75 knot final.
You mentioned trimming is still a bit of an issue. Read back what several of us said about that, then look at the video and your left hand.
Thanks for having the nads to put your video's up. Was quite enjoyable viewing. (sincere, not sarcasm here)
Cheers
Jas