There are many videos on mindfulness/meditation and other related topics. Searching the web using: ‘youtube meditation’ or ‘youtube meditation music’ will get you many. Here are a few:

Andy Puddicombe: All it takes is 10 mindful minutes; idea of mindfulness
http://www.ted.com/talks/andy_puddicombe_all_it_takes_is_10_mindful_minutes.html

Matthieu Ricard: The habits of happiness
http://www.ted.com/talks/matthieu_ricard_on_the_habits_of_happiness.html

Gero Miesenboeck: Re-engineering/rewiring the brain
http://www.ted.com/talks/gero_miesenboeck.html

Joan Halifax: Compassion and the true meaning of empathy
http://www.ted.com/talks/joan_halifax.html

Mindfulness in Schools: Richard Burnett at TEDxWhitechapel

TEDxCollegeHill – Catherine Kerr – Mindfulness Starts With the Body: A View from the Brain

TEDxSunsetPark – Diana Winston – The Practice of Mindfulness

Goldie Hawn and Dan Siegel at TEDMED 2009