There is still using of parameters for conversion that (i say) are not the best.
The video is 600x600. It is saved with 2200 kbps. The original is 1920x1080 and you get 1500 kbps. So when you do not save for a hd monitor hight (1080x1080 in this case) and let the algorithms do the work with the best configuration to upscale the zoomed part, than you do not need that bitrate (amount of data). It does not improve any quality. You need only as much as you can calculate by the ratio of full resolution to 600x600 for the same quality, because where are no details you can not get details by just increasing the bitrate.
But for the ones who want to see in fullscreen mode (here 1080x1080 for the excerpt), they can get good quality only if you let it be zoomed calculated before saving, because the player can not do that in real time what that algoythms do in severel 10 minutes. Especially the parameter for interpolation should be ‘best’.
The sound original is also only 128kb/s and not 256. That is also unnecessary.
btw - the ‘okay’ at the beginning is not part of the original song 