I am no expert, but I am sure in dreamweaver you can just embedd the code that
vimeo gives you and place it into the page in dreamweaver and this link to your videos. I have done it before and works well.
Not sure about the gallery thing, I have used the dreamweaver gallery but not the others - maybe ask your hosting why its not there or maybe it is somewhere else on your computer that you didnt expect it to go?....
Hope this helps a little!