Wait for it ...

Switch the or try a different Video Buffer size. 4. Fix Signature Issues If you see 617 after a YouTube UI update: Go to Settings in the app. Find the Reset or Fix Signatures option. This re-syncs the app's handshake with YouTube's backend. Moving to SmartTube (The Better Choice)

Ensure your TV's date and time are set to "Automatic." Incorrect time causes SSL handshake errors (617).

What are you using (Firestick, Nvidia Shield, Sony TV)?

Handles the latest YouTube API changes more efficiently.

If Error 391 occurs during playback, the hardware may be struggling with the selected codec. Navigate to > Video Player .

Often indicates a playback issue caused by outdated app versions or codec incompatibilities. How to Fix Errors and Make Performance Better 1. Update to the Latest Stable Version

Usually relates to a "Request Timeout" or a signature verification failure.