Figured I would start a new thread since this plugin has been updated ; )
I'm still able to change the dashboard widget contents from a sub-site. This extends all the way to the network admin area.
I was NOT able to over-ride the subsites from the network admin area however. This seems to be backward.
Code for iframe was stripped from sub-site, but not from network admin. This is great, but the video only showed up in my main site dashboard. It didn't show on my subsite. It was also able to be over-written by my sub-site.
Note that I didn't create a special content.php. I'm just using the widget.