Why can't I play a searched video in YouTube?

Episode 1451 (2:08:09)

Bob from Elmwood, NJ
YouTube on iOS

Bob has found that the search feature in his YouTube app has stopped working. He uninstalled and reinstalled it, and it worked shortly, but then stopped working again. Leo says that it could be anything from the app itself, to the service, to the iPad itself. Leo suggests talking to the genius at the Apple Store. Meantime, he should try resetting his network settings.