The video on the top is from a session given by sound designer Steve Johnson and composer Vincent Diamante. In the session they talked about the use of sound design and music as narrative elements in Flower, a game for PS3 developed by Thatgamecompany.
Thatgamecompany’s Flower was an ambitious and unconventional game that saw fruition through an equally unconventional development cycle.
This session features a discussion from the composer and sound designer about the audio, covering how their process, source materials, implementation, and unique method of collaboration came together to convey a narrative without words.
Speaker: Steve Johnson (Sound Designer, Sony Computer Entertainment America), Vincent Diamante (composer, contractor) (March 13, 2010)
There are other 7 videos from the session. You can see all of them here.