The official YouTube app . Google dropped support for devices running Android 6.0 through 7.1 in late 2022 (starting with YouTube app version 17.35.35). If you attempt to open the official app on a Nougat device today, you will likely encounter a prompt forcing you to switch to the website.
Error: "There was a problem with the server [400]"
Impact: Without updated Play Services, the YouTube app cannot reliably authenticate accounts, use location services, or interface with the Google Play billing system. This results in frequent crashes or login failures.