Posting from the USA and new to this thread, but also have the YouTube/Safari reproducible crashing problem.
MBP 14inch, M1 MAX, 32GB, 1TB, MacOS 12.0.1
Spoke to Apple Tech Support and also submitted Apple Feedback on their website - no solution offered.
No pending updates to Monterey 12.0.1 available today, 07NOV2021
Used ERASE ASSISTANT to erase User partition and have clean machine - no APPS, Extensions or anything installed by me. Used my Ethernet cable connection on TB4 port to eliminate wifi speed issue - 200MB/s cable internet.
Started Safari (default config - no changes made) straight to YouTube played 2 4K videos and "BOOM".. screen freeze for a couple of seconds, blank Screen, white Apple, progress bar, login, "your Mac crashed" dialog, I read details and Kernel Panic, Core 0 stopped.
Restarted Safari, changed TAB PREFERENCE to COMPACT, head to YouTube for my next panic attack.... sent that report to Apple as well
Restarted Safari, back to default settings, back to YouTube, changed the settings on the YouTube video from AUTO to 2160/4K... "boom"... another crash report for Apple
So, for me....
(1) Crash is reproducible on a virgin, clean reformatted SSD with the latest MacOS available 12.0.1 to the non-developer community
(2) Crash is always a kernel panic, CORE 0
(3) Crash is agnostic to the YouTube video setting I select
(4) Crash does NOT HAPPEN on my 2020 MBA M1 16GB, 1TB, Monterey 12.0.1 machine
(5) Crash is agnostic to cable/wifi internet connection method
(6) Crash is agnostic to battery/MagSafe power source
I have not tried other means to view YourTube videos, or even loaded a video onto the MBP, or tried other sites - only tried Safari/YouTube... boom/panic/send report.
HOPE this is not a HW issue as delivery for a replacement machine would be ....????, however, I will. keep this machine for one week to see if Apple has a FW/SW fix, and if not, then the machine will be returned to Apple for a refund of my $3099 - my MBA works fine, so should this new MBP !