Mezamashi is always broadcast very early in the morning but I see if someone I know can help as previously she was able to record the show as she's not living in Japan
If not , next alternative is for digest footages preview to be made available on BENI's YouTube in the near future since you can see a BENI Live Digest 2009-2013 on her YouTube account
I don't see why BENI's record label will not release
BENI “Undress” LIVE TOUR 2015 in a DVD although oddly , the tour she did for her BEST album last year , it hasn't gotten a DVD release yet :O
Also not to worry I don't have any BENI concert goods yet & you're able to buy
BENI “Undress” LIVE TOUR 2015 concert goods via
http://beni.lowjack.jp/tour2015/
BENI's previous concert goods were also sold online but I can't find the link now for some strange reason but for
BENI “Undress” LIVE TOUR 2015 , you need to have a proxy or someone living in Japan in order to help you buy them :x