A very thought provoking video that is more relevant today than ever. Personally I think that you are right in that the number of income streams per person will increase. However I would argue whether you have 1 income stream, 100 income streams, UBI or some combination of all of these, it is the quality of the stream/s that matter. What worries me is that more people will be forced into a "gig" economy that totally exploits and underpays them. This scenario could equally apply to UBI if it is not implemented properly.
The world of work as we know will undergo seismic changes driven by new technology and in particular Artificial intelligence. This could free a lot of people from doing menial and dangerous work, allow people to be creative and free millions from poverty. However at the end of the day it up to us to collectively ensure that this happens.