Since this is a third-party app, you must "sideload" it onto your TV:
The new AV1 decoding engine is more demanding on 2018-2019 chipsets. Fix: Go to YouTube Settings > Playback > Disable "AV1 Codec Preferred." This forces VP9, which is less efficient but more compatible with older hardware.
If you want, I can:
On your Smart TV settings, navigate to Security & Restrictions and toggle on Unknown Sources to allow APK installations.
Optimized to provide high-quality video even on budget hardware. Lightweight Footprint: