Except the video goes to show the opposite. The volume that goes through directly, does so with reduced velocity. Meanwhile what goes around - doesn't go "ever

Except the video goes to show the opposite. The volume that goes through directly, does so with reduced velocity. Meanwhile what goes around - doesn't go "everywhere". Instead it stays localized. Now we remember the fact that masks don't cancel social distancing but instead go hand in hand - and it seems to show that it would in fact provide a benefit - containing the aerosol in a smaller radius around the mask-wearing individual.