They were made back in ~2006-2010. See the youtube descriptions for the original dates. Started making these before Youtube 720p, or even Netflix DVD streaming was a thing. 
Nowadays more can be done, and in higher quality. It's incredible how just recording tech has improved. I used to fly at ~24fps and record <30 seconds at a time in the game. Made flying and shooting difficult, but it turned out okay in video form. It was almost slideshow while playing in real time for me.
Animl, it's cool to see film making threads active again. This forum used to see films by many players back in the day. They all had their own style they shared here. Even the lower quality video or sound videos were fun to watch. We were just happy to watch others fly and listen to their choice of music they liked. You made a film and you most likely ran into the many technical limitations and creative hurdles we all go through. There are many aspects, workflows, categories in film making process to mature in. As a sound guy you know that is part that really makes a film most immersive. Now you have a workflow and process you can build on. You've already succeeded. Have fun making your next one. When you do things right, people won't be sure you've done anything at all.
Audio, selection, and quality (clarity) does set the imagination in motion. The better the quality the better the immersion factor. The brain should not work over time to accept the audio. With audio, you’re only sure something has been done to it if it has flaws. Its a distraction to immersion.
You can have nothing but a still pic of a junk car, but the right selection of music and clarity can tell a story of the car, even with no lyrics. It brings it to life.
I can tell several understand this by some of the vids I see. If one wants a gripping video don’t pick your fav song, pick what brings out the story you’re telling.
In my own vids, without the selected music, its hardly worth watching.
My videos were made with no system tweaks at all, and cheapest software. I did it on purpose, to show what the average player could make. I also should have spent more time on them? But not this busy time of year.
Talking to a union videographer today about upping my quality on a pc. He uses physical components, not pc, but said he’d see if he could help me out.
My vids look much better on 4k tv from yt.
My true deficiency/limitations are I can’t get the panning I really want without TrackerIR or VR.
