viking , 4 hours ago

Is the browser somewhat up to date? In case Chrome doesn’t work, try Firefox or Kiwi.

But it’s quite possible that 4.x is so far outdated, some necessary system routines are simply missing and can’t be replaced.

Even tubular (alternative youtube app) is only backwards compatible to minimum 5.0 -> github.com/polymorphicshade/Tubular

Make sure that all system dependencies such as Google play services are running the latest compatible version -> m.apkpure.com/…/com.google.android.gms (most likely you’ll have to go to “old versions -> show all” and then try one version per year until you can narrow it down to something that works).