Problems with Uploading VIDEO file from server folder with asp.net mvc Freamwork 4.5

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.

this is my web.config file

<system.webServer>
    <modules>
      <add name="ITHitPutUploadProgressAndResumeModule" type="ITHit.WebDAV.Server.ResumableUpload.PutUploadProgressAndResumeModule, ITHit.WebDAV.Server" preCondition="integratedMode" />
    </modules>
    <security>
      <requestFiltering>
        <requestLimits maxAllowedContentLength="2147483648" />
             </requestFiltering>
    </security>
  <system.web>
       <machineKey validationKey="27EB98EE963154462FD2DF6296D9B5BF34FA18067C15056DA4778903452D89EE964CD7574A3250E0C7827BFD0E10523D45452CBB20C05F258BBEE14B514A2E78" decryptionKey="6152EBDEDAE45C66209DF59FD7BB05E2ED28180E285DDAF6FCD3B81E77EED54D" validation="SHA1" decryption="AES" />
    <customErrors mode="Off" />
      <httpRuntime executionTimeout="3600" maxRequestLength="2097151" requestLengthDiskThreshold="2097151" shutdownTimeout="500"/>
    <compilation debug="true" targetFramework="4.5">
      <assemblies>
        <add assembly="System.Web.Abstractions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add assembly="System.Web.Helpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add assembly="System.Web.Routing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add assembly="System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add assembly="System.Web.WebPages, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
      </assemblies>
    </compilation>
    <authentication mode="Forms">
           <forms loginUrl="~/Home" defaultUrl="~/Home/Index" timeout="20" protection="All" slidingExpiration="true" />
    </authentication>
    <caching>
      <outputCacheSettings>
        <outputCacheProfiles>
          <add name="10Mnt" duration="600" />
        </outputCacheProfiles>
      </outputCacheSettings>
    </caching>
     <profile>
      <providers>
        <clear />
        <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/" />
      </providers>
    </profile>
         <providers>
        <clear/>
        <add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/"/>
        <add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/"/>
      </providers>
    </roleManager>-->
    <pages controlRenderingCompatibilityVersion="4.0">
      <namespaces>
        <add namespace="System.Web.Helpers" />
        <add namespace="System.Web.Mvc" />
        <add namespace="System.Web.Mvc.Ajax" />
        <add namespace="System.Web.Mvc.Html" />
        <add namespace="System.Web.Optimization" />
        <add namespace="System.Web.Routing" />
        <add namespace="System.Web.WebPages" />
      </namespaces>
    </pages>

  </system.web>

so plz help me.