doc contain video

[mandy]

how we define metadata type for uploading video and images in a document.

[kaynezhang]

Do you mean definite new type with multiple file attachments?
If yes ,you can define it like this

   <type name="newtype">
            <property name="property1">
               <type>d:content</type>
               <multiple>false</multiple>
            </property>               
            <property name="property12">
               <type>d:content</type>
               <multiple>false</multiple>
            </property>               
         </properties>
      </type> 
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or use a content property with multiple value

   <type name="newtype">
            <property name="property1">
               <type>d:content</type>
               <multiple>true</multiple>
            </property>                            
         </properties>
      </type> 
‍‍‍‍‍‍‍‍‍

But why do you want to do that ,why not use document assocation?