(Trying to play a video on old phone) "So I downloaded the APK. Here is the reality check..." (Shows error: "Network Error 400") "It doesn't work. Google forces you to update."
(Conclusion) "Version 5.9.0.13 is the app equivalent of a classic car. Beautiful to look at in a museum, but you can't drive it to work. Use ReVanced instead." youtube 5.9.0.13
(Screenshot of the old UI) "Look at this. A clean video list. No Shorts. No comments section fighting for space. Just the video and the dislike bar. This is the 'Purist' build." (Trying to play a video on old phone)