chromium_os-raspberry_pi VS grepo

You could also try installing FydeOS or ChromiumOS on your RP 400, either of which should allow you to run android apps natively. https://github.com/FydeOS/chromium_os-raspberry_pi/releases

Chromium OS works pretty well on my (overclocked) Raspberry Pi 3b, albeit quite a bit laggy. It should work much better with the Raspberry Pi 4b (with 2Gb+), although I think Ubuntu (or Pop!_OS) would be a better option. See https://github.com/FydeOS/chromium_os-raspberry_pi.

Not official but I run this. Works perfectly

You could try Chromium OS ( https://github.com/FydeOS/chromium_os-raspberry_pi/releases ), it works well on my Pi 4 4G. I usually run Raspberry Pi OS (currently bullseye 32 bit) and can stream YouTube well at 720p. It breaks up and stutters badly at 1080p.

Hi , as you can see and test , there is support for VP9 codec in Chromium OS build for raspberry pi : `Optimised hardware-accelerated VP8/VP9 video stream decoding, you should now have a smoother YouTube video (supports 1080p@30) playback with much lower CPU usage`

Fix: https://github.com/FydeOS/chromium_os-raspberry_pi/issues/111

With Kiss, musl is used instead of glibc. That means you could have some troubles with some software. I have some troubles with a printer driver for example. I need to use an opensource version, but the driver is worse than the proprietary one. It works. I sometimes need libreoffice, but it's not packaged for kiss linux. To package it, it would be necessary to package a lot of dependencies. So it has not been done until now. If you really need glibc in Kiss, you can install a version with glibc in a chroot. There is a version with glibc instead musl. You could even install a version with glibc instead of musl. I think you can install some softwares with flatpak, for example libreoffice, but I have never done it. Someone else must confirm if it works.

Be ready to not be able to run proprietary sofware (Widevine, Nvidia, Games) due to KISS using musl. Unless you know how to use gkiss, prepare to not run an ide and learn vim.

Although, there's nothing stopping you from using glibc with KISS Linux if you'd like -- I believe an example is GKISS if you'd like to take a further look.