Hello!

How do you build in Turkish an imperative form where there are two verbs one following another, like "Go stand in the corner!"

Would "Köşede durmaya git!" be all right or are there any other possibilities?

And one more thing, I saw the video "Oğlum bak git" which recently has become popular on the web in Turkey. And I have doubts concerning the title, that is the phrase repeated by the man in the video: bak git! Is this a similar double imperative as I´m asking for above? Like "go see (something)"? However I don´t understand it in the context of the video. What is he supposed to see?

Go stand in the corner

it can be translated as you wrote and also you can use like this using "ve" between the imperative sentences

an example:

 Git ve bana bir fincan çay getir.  Go and bring me a cup of tea

Oğlum bak git! (for males )

 Kızım bak git! ( for females )

it is a slang used to show your anger and to get rid of someone. You can face with this slang when you make some angry or when you make fun with someone.

an example

A: Bana bak şişman çocuk. ( Look at me you fat guy )

B: Oğlum bak  git.  (used to warn that you are angry )