Here is a small guide on how to easily use YouTube-DL the easy way on Android. Since the utility is originally made without a GUI, here's some configuration I do on my phone to make it quite straightforward to use.
This page tests the trickle ICE functionality in a WebRTC implementation. It creates a PeerConnection with the specified ICEServers, and then starts candidate gathering for a session with a single audio stream. As candidates are gathered, they are displayed in the text box below, along with an indication when candidate gathering is complete.