I was watching a travel video about Burgenland (Austria), and was taken aback by the interview with this woman, at 2:41 here:
There's also an interview with her brother later on in the video. His T's and D's are also flat-frontal, but at least he trills his R's unlike her.
Her pronunciation sounds extremely Russian or Slavic to me. Is she a Slav? Does she have an accent?
In particular, the R's are 100% Russian or Slavic (frontal and rolled), and the T's and D's are almost 90% Russian, very frontal (close to the teeth and no puffing). This is exactly how Russians talk, with frontal sounds and rolled R's. In German I thought it was more alveolar-ridge for the T's and D's (like English, and with a slight puff), and rear-throat trills for R's.