That address is most likely for a client that the most popular french language pirate streaming Cacaoweb site uses. http://cacaoweb.org/
Basically if you go to that site and download the client you will have a web service running on port 4001 which will accept certain parameters.
The links for that service (and other similar services) are published on the internet pointing to the local loopback address with a resource identifier of the specific content in question e.g. http://127.0.0.1:4001/?f=4a3aba6e5e7cff2825347f7293a462ae
Pressing that link on an machine on which the client is installed will allow you to instantly view the content, on machines on which the client isn't installed it won't do anything (think of it as a torrent magnet link).
So while it's a bit silly to see that you see a local loopback address on a DMCA request what they want Google to do is to not display search results that actually provide the link to the content, even if that link requires dedicated software.
I've encountered this while doing some investigating into several breaches on some sites, the breaches didn't deface anything and they didn't seem like they cared to compromise the content of the site either. What they did leave is allot of JSON content which was looking like this:
"episodelinks": [ { "link": "http://127.0.0.1:4001/?f=73b2ca67915c6e6f7cc67dd75379bab6","...: "en","subs": "" }] }, { "episode": "2", "episodelinks": [ { "link": "http://127.0.0.1:4001/?f=4a3aba6e5e7cff2825347f7293a462ae","...: "en","subs": "" }] }] }, { "season": "2",
That content was then accessed over and over by multiple different clients from mostly french speaking countries oddly enough more from Africa and Canada than France (which there is also quite an interesting anecdotal reasons to why, Africa well can't afford and doesn't have Netflix and Canada rarely gets decent french Dubs these days as most American shows will be only broadcast in English even if they are dubbed in French for France or other regions.)
Some of the HTTP clients were sending User Agent's of various streaming apps including the cacaoweb client.
What Universal seems to want is to make sure Google doesn't display these lists on forums and various sites and there's not really a better way to do it than to include $HOME:1337/agrirpirate! currently :<
What people need to understand with the DMCA requests is that it's not intended to only remove the URL from showing up in google results as that is ineffective it prevents any website with that url in it's content from showing up as a result especially when tied to certain keywords.
Blocking say the piratebay or whateversiteahsreplacedrapidshare.com on google ins't effective making sure that all of the 10000's of forums that are used to actually publish the links wont be displayed when people search for Taylor Swift New CD Torrent on Google is.