These debates are a good way of getting familiar with sophisticated ways of interacting, negociating, expressing opinions, accepting others' views, rejecting others' arguments and so on. The topics they deal with are US foreign policy, technology, climate change or religion.

https://www.youtube.com/watch?v=E3G4LA-QwR4
https://www.youtube.com/watch?v=Yx0CXmagQu0
https://www.youtube.com/watch?v=QyIQrS0Wqr0
https://www.youtube.com/watch?v=vmTLdSfHh_U
https://www.youtube.com/watch?v=W8qPtLmfwZ4
https://www.youtube.com/watch?v=AntDHcgDEks
https://www.youtube.com/watch?v=LDD6XZ55TAI
https://www.youtube.com/watch?v=mOU306AvvHE
https://www.youtube.com/watch?v=trSaVLbfspg
https://www.youtube.com/watch?v=mMraxhd9Z9Q

Free uni lessons!!!!!!!!!!!!!!!!!!!!!!!!!..On lots of different subjects!!!!!

Philosophy
https://www.youtube.com/watch?v=nVQKbQVc2_w

History
https://www.youtube.com/watch?v=ZC8JcWVRFp8

Economics
https://www.youtube.com/watch?v=2yycGEFCNYE

Literature
https://www.youtube.com/watch?v=FgyZ4ia25gg

Chemistry
https://www.youtube.com/watch?v=WSYEApgJkh0&list=PL3F629F73640F831D

Architecture and civil engineering
https://www.youtube.com/watch?v=Hm-1Vc3JlWs

Physics
https://www.youtube.com/watch?v=NK-BxowMIfg&list=PL5694B25F659D95B0

TED speakers on language acquisition...

https://www.youtube.com/watch?v=d0yGdNEWdn0
https://www.youtube.com/watch?v=-WLHr1_EVtQ
https://www.youtube.com/watch?v=6a6vVIdQBd0
https://www.youtube.com/watch?v=xNmf-G81Irs

and CUSP speakers on business and enterpreneurship

https://www.youtube.com/watch?v=JaZPBonUKBY
https://www.youtube.com/watch?v=kOpaIeKRo_w
https://www.youtube.com/watch?v=Yp4Z5uusd_I
https://www.youtube.com/watch?v=hVvGJKzxzEE
https://www.youtube.com/watch?v=fwxmdyC4F3U

 Confrontational film club???
https://www.youtube.com/watch?v=7qxpBxVVKNE
https://www.youtube.com/watch?v=GCmrOzhoUcs
https://www.youtube.com/watch?v=d3QrNpxTzm0
https://www.youtube.com/watch?v=EY0diaHlC2w
https://www.youtube.com/watch?v=6sFwzpUGTpg

I can think of a particular student who will enjoy this...
https://www.youtube.com/watch?v=V21JiiP-CvI
https://www.youtube.com/watch?v=qUcwytnlDsM
https://www.youtube.com/watch?v=2CwS60ykM8s