http://www.youtube.com/watch?v=EYSdlcEQ02c
I don't see why they put robots in Skyrim, I don't really like the addition. It seems completely out of place.

There are much more educated people than me that are better to answer this, but the Dwemer were an advanced civilisation.

The Dwemer contraptions have been around since Morrowind. As mcleod rightly says, the Dwemer were very highly advanced.

Those are not robots but automatons...which is probably pretty same...but nevermind. Well I assume that if they can't open in they would do it just by force or they are somehow recognized by the ruins themselves...whatever. i don't see it as a bad thing - it adds more variability y'know.

They are Dwemer constructs powered by soul gems they are very much in place in tamriel and are not new additions to the series by any means.

They're not an addition. They're a central part of TES lore.

More specifically, they live and move with the help of steam power, soul gems and advanced magic. And indeed, nothing new: they've been in TES since morrowind.

Lore-wise they've been in TES for quite some time. Much earlier than the dwemers disappearence.

Well, they arent really an addition, they were in Morrowind and Redguard.

They are also not really robots, but technomantical constructs, they work as much on magic as on engineering.
The Dwemer were odd and clever. They have been extinct a long time, its truly a marvel that their automatons still carry on their duties.
Somewhere down there must be automated repair shops, perhaps even entire assembly plants still in operation.