I agree with the point of your comment but this particular post is regarding employees and seems like this has been in place for 3 years at least (tweet mentions it).
I started moving away from Apple a few months ago, much before this Apple CSAM debacle. This is a pretty big move for me because I am a developer who makes apps for both iOS and MacOS, so I pretty much need Apple software for work.
No longer buying iPhones or Macs. I was planning on upgrading to the Mac Mini with M1 chip later this fall but now I plan on building a hackintosh instead. I also no longer recommend Apple devices to friends/family.
I got myself a cheap android phone which I have de-googled myself. I got this Android phone ($190 USD for a very good phone - 8GB ram, 12gb space):
https://www.amazon.com/UMIDIGI-Unlocked-4150mAh-Capacity-Sma...
I use Firefox for YouTube on it with the following add-ons:
1. uBlock Origin
2. Video Background Play Fix add-on
This allows me to use YouTube as a background playback music player. And if needed, I use YouTube-dl to get the audio files and put them on the phone.
You can check out several tutorials to de-google an android phone.