Seahorses are nowadays a rarity to see, so it’s always heart warming to see footage showing them! It is even more heartwarming when footage and photos are shot responsibly. Reminder: do not use lights or flashes, keep distance, watch your fins (don’t hit other seahorses whilst filming their buddy) and report sightings to the Seahorse Trust.
Reminder as well: Seahorses are very easy to stress, and stress kills them! If they turn their back to you, it means they are not happy with your attention. Seahorses are a protected species and sorely need to be protected further, legally and in practice!