Setting file upload size limit per file type using PowerShell.
Although SharePoint Central Admin only allows you to set a maximum file upload size per web application, you can use PowerShell to set it per file type. Below is the PowerShell command (thanks to Matt Narayan for finding this).
$webApp = Get-SPWebApplication "http://sp2013" $webApp.MaximumFileSizePerExtension.Add("avi",500) $webApp.Update()
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