@3q3q: I have not came across that DVD video before from Young Animal Arashi Platinum, but I do know it does feature Risa Yoshiki on the cover at least according to the info I had gathered from Amazon Japan/Neowing, the exact cover and information on who's on the 2 bonus DVD attached can be found
here. I hope it can be helpful in someway if you are interested to hunt for the magazine on Yahoo Auction, but usually these kind of premium issues (Young Animal Arashi Platinum usually only comes out like twice a year from what I understand by japanese publisher
Hakusensha) after been released gets snapped up pretty quickly as these issues gets sold out pretty damn fast as these are considered premium issues, so I doubt you can find a new copy right now on popular known sites Amazon.co.jp/CDJapan/7netshopping.jp as this was out since August 2012. Yahoo Auctions JP do come up with used copies from time to time for these magazines, but I think you have to read the auction description posted by the sellers carefully as not all the time these magazines will come with the bonus DVDs included.
A good clue to know this is by the listed auction price, usually those used magazines will go up for bidding between 500 - 1500yen for issues that comes included with their original DVDs unopened, but if it goes for below 500 yen most likely they are just bare issues with just the magazine alone. (I don't do Yahoo Auction diving often, but this is just my personal observation that's all since i'm japanese literate)
And thank you for your PM msgs with those download links for Risa Mania PB's bonus DVD, I just saw your PM today and just tested those Uploaded/Bitshare links, they are working fine no problem at all. Again thank you for your great help and efforts, you have been a very very kind friend to me. Let's keep in touch mate!