How do I access my subscriptions and favourites? You need to sign in with your YouTube account on the settings screen. You can also save local favourites to your device without signing in.
Can I listen to music with the app in the background? Yes, simply start playing your video, close the app and then continue the video by double pressing the home button and pressing play on the multitasking controls.
When I try to load things from my account such as favourites I get a "Load Failed" message, how can I fix this? To fix this message you need to create a YouTube account on your Google account. To do this visit this page: https://www.youtube.com/create_channel. We are working on an update to properly inform you about this issue in the app.