I have created custom module for backend in Magento 1.9.

That module applicable to all users and roles.

<menu>
        <videos module="videos">
            <title>Video Tutorials</title>
            <sort_order>900</sort_order>               
            <children>
                <bitsvideo module="videos">
                    <title>BITS</title>
                    <sort_order>5</sort_order>
                    <action>videos/adminhtml_videos</action>
                </bitsvideo>
            </children>
        </videos>
    </menu>
    <acl>
        <resources>
            <admin>
                <children>
                    <videos module="videos">
                        <sort_order>900</sort_order>               
                        <children>
                          <bitsvideo module="videos">
                              <title>BITS</title>
                              <sort_order>5</sort_order>
                              <action>videos/adminhtml_videos</action>
                           </bitsvideo>
                        </children>
                      </videos>  
                </children>
            </admin>
        </resources>
    </acl>

How to write acl for that.

The above code refer my acl.

Where I need to change.?