So his footage is upscaled ? In the clip he states it’s straight from the camera.
Here is in a big nutshell how YT works:
MM records 2.7k, the first video on YT is 4K, it had to be upscaled, anything you watch on YT is not straight from the camera, it is always processed by YT. (in first video the guy didn't adjust colors)
MM Video straight from the camera is 2.7k at 40mbit. YT plays way lower bitrate 20-25mbit for 4k (it recommends uploads 35-45mbit so it has a buffer to work with) YT plays 8mbit for 1080p and 4mbit for 720p (there are small variation based on frame rate and peaks might be a bit higher, those are average values)
the second video was downsampled to 720p (for no reason at 60 frames...) with a 4mbit rate that is 10 times lower quality from an original, guy who uploaded it does not care or know how to make it look good on YT.
If you would download the first video from YT in maximum resolution first would take 2.4GB and second only 310MB (I just checked with YT downloader)
In the first video, the guy knows how YT works and he edited the video and prepared to look best it can look on YT with minimal quality degradation. In second case footage got absolutely butchered. (we still do not know what codecs they were using in final render before YT upload))
In both cases, real straight out of camera footage looks better than what you see in those videos.
If you would watch original files on 4k TV you would be blown away in both cases, especially considering they were both produced with 400$ toys.
I will later upload a few original files straight from the drone, no sound no editing nothing just files and see how YT will process it, I'm sure it will cut bitrate by 50%