The Black Sea vessels seen in the SBS video are ocean-going ships, far larger than the flat-bottomed river couriers Ukraine has been burning along the Azov feeder route. The footage from the FP-1 or FP-2 attack drones shows the operators aiming mostly for the deck structures rather than the bridges, with follow-up drones filming the fires that spread after the first strikes.
I think a lot of it was supposed to come from Belarus, since their refineries were not targeted… yet.