From the YouTube description:
It’s been a little over a year since legendary singer and poet Leonard Cohen passed away. We thought now would be a good time to share this really special performance of Adam Cohen performing his father’s classic song So Long Marianne.
I can’t be sure but this may be from the same performance shown in the Adam Cohen – Like A Man EPK (see screen capture from that video below)
Thanks to Marie M, whose post at Speaking Cohen alerted me to this charming video