Video matrix Saturday 18/04/2014

1. British Muslims dance to Pharrell Williams’ “Happy”

The video by Honesty Police has gone viral but has been attacked as “sinful” by a vocal minority.

2. South Korea ferry sinking (new footage)

Amateur footage has emerged of the passengers inside the ferry being told to stay put moments before it capsized, causing hundreds of people their lives.

3. Internal force of an avalanche research after 13 people die at Everest

An archive video shows a scientists’ research which calculates the enormous internal forces of an avalanche. Expert explains how it gains energy and velocity.

4. Independent on Sunday Happy List 2014

Lisa Markwell talks about the Happy List and invites readers to send over their nominations of inspiring people for this year’s list.