Problems with Uploading VIDEO file from server folder with a

I want to convert a .Net framework 4.5 code into Asp.net MVC. This is basically a Video upload when live streaming is stop . Now I face some problems. What is the maximum value of maxRequestLength? I already add this line in my web.config file but request time out when take time more then 1 minuts and file size more then 999 kb. My IISvirson is IIS7.5

this is my web.config file













































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so plz help me.