Here is a picture of a buffered bike lane in New York showing what it should not be used for. Note the potholes and drainage grate - they didn't get everything right.
What I find interesting in the video is the bridge in the background as Mayor Adams talks. It would appear to be a vehicle bridge that has one lane used by cyclists and pedestrians but I see no marking on the road to delineate this. I Googled and found a Streetfilms video on the Bridge - it is Hawthorne Bridge. It is clear in the video that it does have a kerb between the cars and bikes but interestingly no railing. Considering the obvious capacity issues on the ped and cycle section this seems a bit risky.
The bridge carries 7,200 cyclists per day which is 20% of the traffic on the bridge and it would appear that there are many pedestrians on the bridge too. Any conflict between cyclists or with pedestrians could catapult a cyclist straight into traffic.
Interesting fact I gleaned from the Streetfilms blog is that the number of cycle commuters in Portland has increased 600% in the last 15 years. If you build it, they will come (as said in the video)