Nay, the seal throwing footage shows up in all the ORCA documentaries. I saw it Blue Planet and the latest one (the one with Pengun peeling). As I had mentioned earlier, their findings suggest that WHAT the Orca eats is largely social == they called it culture. Certain pods eat only fish, others only penguins, others whales...etc.
I thought it interesting that they only use Orcas that eat fish at Sea World et. al. Part of it, I am sure, is its easier to feed em fish than hunt down seals etc.. The other may be safety to the trainer. From that documentary, seems like the biggest risk to humans are from the rogue Orcas which seem to like the mammals, pinipeds (sp?)...I think before I dove in the water with an Orca, I wouldn't want to know what it eats...if its fish, I'd go...anything else...hmmm....I don't think so.