This query could be referring to a few different things. Did you mean: YouTube Vanced or other third-party modded clients for older Android versions? official YouTube app compatibility and installation for Android 4.1.2 Jelly Bean
Because this was a patched version of an older APK, it didn't aggressively fight to be the foreground app. It obeyed the older, simpler rules of the operating system. He tapped the screen back on, hit play, and then locked the device. download youtube for android 412 patched
Version Spoofing: Patches often involve "spoofing" the app's version ID to a newer one (like 19.17.01) to trick YouTube's servers into allowing the connection. This query could be referring to a few different things
Since you cannot use the official Play Store for this, you must allow your device to install apps from third-party sources. Go to Settings > Security. Find Unknown Sources and toggle it ON. Accept the warning prompt. 2. Choose a Patched or Legacy Client It obeyed the older, simpler rules of the operating system