Hello!

Most baby bunnies are full of love and cuddlyness, but their personality might change as they grow up.

Secondly, you can’t bond a baby. Baby bunnies generally get along with anyone, but it isn’t a bond. You need to wait until baby is old enough to be neutered, and then start the prebonding and bonding process. I would also recommend that you get a vet to double check that Ciaran is actually neutered, as its very difficult and risky to bond unneutered buns. What makes you think he might not be? What do you mean by interesting relationship?

Regarding Ciaran, do you know how old he might be? Did they do ultrasound at all?

We have a member here whose young, male rabbits ended up needing needing abdominal neuters done. It was thought they might be intersex rabbits but turned out they had undersized, undescended testes and no scrotum.
I ask about age as some older, neutered rabbits can become humpy too. My lop did around 6-7yrs of age.

Finally watched the video. They are doing pretty well. Jazzy is just a bit uncertain of Loxi.  The trust will build the more interaction they have. Loxi’s pretty confident by the looks. I don’t think you need worry about the butt “nips” or nudges. It’s sort of how they communicate and will even do this to us sometimes. Have you ever been sitting on the floor and your rabbit come up and nip or nudge your side? It’s sometimes a “‘scuse me, coming through- Move” “hello, acknowlege me” and a bit of dominance, I think. The female in one of my pairs still nips at the males butt, especially when they are up higher and he’s about to go down the ramp. She’ll pull out a bit of fur. The fur comes out more easily there and he doesn’t react or it turn into a fight. When you see them both going for butt and they start to circle each other fast, that’s when it is escalating and needs intervention.

You could probably pet them side by side when in the tub to help things along a bit. If Jazzy responds well to being pet. 

While it is ideal to wait until the younger one is desexed too, people have gotten their rabbits living together prior to that. You’d just need to be aware that the bond would be challenged when the younger reached sexual maturity and you may have to separate them. That would mean bonding again after the younger has had the op and hormones have leveled out.