More than one species of seahorse there? The one with the saddle markings may be the Hedgehog Seahorse, H. spinosissimus. (Can't quite tell if it has prominent spines from that video.) These are often collected as bycatch by SE Asian trawlers and wind up in the Chinese traditional medicine market. The other two species that are known for saddle markings are H. erectus and H. histrix. Could be erectus, doesn't look like histrix. Finding out where they were collected would answer the question, spinosissimus is Pacific, erectus is Atlantic.
Pipefish look like the Alligator Pipefish, S. biaculeatus.
alligator pipefishes are good eaters, and can be acclimated to eat frozen foods like mysis.
however, some require live food.
dont know the seahorse species.....they look like wide bright eyed ones