There are quite a few reasons for Apps to not work on LG smart TV. Corrupted files, cache data, internet failure, an outdated app, etc. Although crashing of apps happens when they are not updated. This issue can be fixed by updating the app. A corrupted app or bug might also be the cause of disability to run any app.
Now try the YouTube app again. You may want to keep these instructions handy; a good restart solves a lot of TV bugs. 3. Check Your Internet Speed. Slow internet can often cause buffering issues with Youtube and other video and streaming apps. In extreme cases, your internet may be too slow or unreliable to even connect to the YouTube servers.