Capriccio will release a DVD of Walter Braunfels' opera "Ulenspiegel" (from the performances in Linz/Austria in September 2014) in January 2017. Already now the DVD can be ordered by mail to office@entarteopera.com, they possibly sell it cheaper (22,- Euro - I do not know the regular prize) but charge shipping costs. I have bought it already: sound (stereo and surround) and vision are great, the performance was wonderful (I have seen it three times in Linz)! Subtitles in English and German are included.
http://www.entarteopera.com/shop.htmloffice@entarteopera.com
There is also an old trailer somwhere at the homepage, but the sound of that one is not good, since the trailer is not taken from the DVD but was quickly and sloppily produced right after the performances.