For a 1080p video, "Extra Quality" consumes roughly 15-20 Mbps instead of 5-8 Mbps. The difference is visible on iPad Pro displays and 14-inch MacBooks (via Sidecar).

Patches that fix the "Sign-in" issues prevalent on older versions. How to Install the YouTube IPA

: If you previously owned YouTube on your Apple ID, you can sometimes download the "Last Compatible Version" from the Purchased section of the App Store . However, this version often triggers a "Update Required" lockout that requires a jailbreak tweak (like DisableYouTubeUpdates ) to bypass. How to Install

If you install an old IPA and it fails to load, it is usually because the app’s version string is too old for Google’s servers. You can fix this by the version number.