The only sorta positive thing I can see is that Biden isn't explicitly telling people to come out, instead to request mail-in ballots. However, I can't find any mention of him on his twitter or website that matches what Bernie is saying with regards to how it's absurd that the primary is still planned to move forward instead of delaying it as recommended by public health officials, one such example here.
Edit: Oh, I hadn't gotten far enough into the video to comment there, Biden explicitly says that people should go vote, because the circumstances of a convention isn't the same as polling places.