Here's a list to get you started. They're pretty addictive.
Your Brain on Music: https://www.youtube.com/watch?v=MZFFwy5fwYI
The Transformative Power of Classical Music: https://www.youtube.com/watch?v=r9LCwI5iErE
How Sampling Transformed Music: https://www.youtube.com/watch?v=H3TF-hI7zKc
Bobby McFerrin Demonstrates the Power of the Pentatonic Scale: https://www.youtube.com/watch?v=ne6tB2KiZuk
How to Truly Listen: https://www.youtube.com/watch?v=IU3V6zNER4g
How Playing an Instrument Benefits Your Brain: https://www.youtube.com/watch?v=R0JKCYZ8hng
Reggie Watts Disorients You in the Most Entertaining Way: https://www.youtube.com/watch?v=BdHK_r9RXTc
Copyrighting All the Melodies to Avoid Accidental Infringement: https://www.youtube.com/watch?v=sJtm0MoOgiU
The Mad Scientist of Music: https://www.youtube.com/watch?v=46w99bZ3W_M
4 Simple Steps To Writing A Song: https://www.youtube.com/watch?v=u0K_xcSqhxQ
How to Practice Effectively...For Just About Anything: https://www.youtube.com/watch?v=f2O6mQkFiiw
Music as a Language: https://www.youtube.com/watch?v=2zvjW9arAZ0
How I Found Myself Through Music: https://www.youtube.com/watch?v=tS2aI-c3Q8A
Finding a Place Through Music: https://www.youtube.com/watch?v=nOHVw_qktoM
Hit Song Science: https://www.youtube.com/watch?v=ELeUv-PyXBE
The Illusion of the Shy Musician: https://www.youtube.com/watch?v=a_yRFXZHl_g
The Polyphonic Me: https://www.youtube.com/watch?v=dIh8KBOOkYU
The World’s Ugliest Music: https://www.youtube.com/watch?v=RENk9PK06AQ
What the Music Industry Really Sells: https://www.youtube.com/watch?v=rsVcXFBHvrc
A One-Man Musical Phenomenon: https://www.youtube.com/watch?v=dDZoGcQVjJg
A Different Way to Visualize Rhythm: https://www.youtube.com/watch?v=2UphAzryVpY
Music and Math: The Genius of Beethoven: https://www.youtube.com/watch?v=zAxT0mRGuoY
The Science of Dubstep: https://www.youtube.com/watch?v=d8s8e8JdGCc
How Music Can Heal Our Brain and Heart: https://www.youtube.com/watch?v=NlY4yCsGKXU
Music and the Inner Self: https://www.youtube.com/watch?v=QUUFb-1hBtw
A Musical Genius: https://www.youtube.com/watch?v=9UotQ5T-f1o
Why Most Piano Players Fail: https://www.youtube.com/watch?v=T-cbdnP0Hyc
The Harmonic Series In Music: https://www.youtube.com/watch?v=JDFa8TSn6vY
Pop Music is Stuck on Repeat: https://www.youtube.com/watch?v=_tjFwcmHy5M
Why We Love Repetition in Music: https://www.youtube.com/watch?v=1lo8EomDrwA
What if Every Child Had Access to Music Education From Birth?: https://www.youtube.com/watch?v=ueqgenARzlE
Music is Medicine: https://www.youtube.com/watch?v=NOFfuLoHoMo
The Power of Music: https://www.youtube.com/watch?v=cmF_HbP-jd0
The Power of Musicals: https://www.youtube.com/watch?v=ENzjqwGcb8Q
The Orchestra In My Mouth: https://www.youtube.com/watch?v=DFjIi2hxxf0
How to Translate the Feeling Into Sound: https://www.youtube.com/watch?v=q5yxIzs5Wug