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.
3-6K video h265
4-4K video All-I 400mbps
Thanks, I am semiretired just produced footage to sell, my standard is far from youtube, always near broadcasting since the Betacan era. I read something on the web confirmed by your reply, will use 400mbps.