This video from TV2 Denmark was shown near the beginning of Roger’s talk:

Later in his talk Roger sings a couple verses of Joni Mitchell’s Both Sides Now. The guitar is a bit too loud in the mix to catch all the words to the verse written by Pete Seeger in reply to Mitchell’s song. Here are the lyrics:

Daughter, daughter, don’t you know
You’re not the first to feel just so
But let me say before I go,
It’s worth it anyway.
One day we all may be surprised;
We’ll wake and open up our eyes
and then we all will realize
The whole world feels this way.

We’ve all been living upside down
and turned around with love unfound
Until we turn and face the sun –
Yes, all of us. Everyone.