from what I’ve seen.
anything over 150mbps you won’t notice on youtube. so you can save your bitrate.
all-i has better panning and smoother motion.
anything with fast moving subjects will look better if over 100mbps.
the 6k h265 is beta and doesn’t look as good as the rest. due to poor compression algorithm.
hlg has muddy shadows.
420 doesn’t grade as well, neither does 8 bit sunsets.
1-100mbps 422
2-150mbps 420
3-6K video h265
4-4K video All-I 400mbps