With the Android operating system 2.0 you can have multiple sounds for alerting you. One sound for messages, one for reminders, and also a default ringtone. Here's how change the default ringtone on your Android phone.
With "My Queue" you can quickly save videos to watch later.
To add an item to your queue just click the sign next to the video.
Once you've added a video visit "My Queue" to start watching!