Do they supply little complementary shampoo and body wash in the room? I saw a video that someone showed that there was a big bottle of shampoo, conditioner, and body wash in the shower. Was wondering whether supplied by Disney or by traveler.

Yes, they supply the shampoo, conditioner and body wash in a dispenser in the shower.

Its big bottles

Yes they provide those things

It's big bottles of shampoo, conditioner and body wash, all attached to the wall of the shower wall. They no longer have the little bottles

Jumin is right, however I will tell you that the body wash contains whatever that cooling mint stuff is, which is not great of you have sensitive skin (I stopped there and didn't use shampoo or conditioner).

The shower/tub that we had included Disney brand body wash, shampoo, and conditioner in bottles attached to the wall.