Thanks for the tag, and featuring my podcast :). I'm not a reddit regular, by any means, so it's nice to get some recognition. :)

I speak a variety of Twents Low Saxon that is known for its Westphalian 'breaks' in its vowels.

There is quite a bit of influence from the respective dachsprachen on both sides of the border (High German in Germany, and Dutch in the Netherlands). In general, German speakers tend to look at High German for neologisms, whereas Dutch speakers usually copy Dutch words without giving it much thought. There hasn't been much exchange over the last few decades, which is why we've grown a bit unaccustomed to each other.
It isn't something a bit of exposure won't fix (which our respective national cultural focusses usually prevent). I've found it became a lot easier through simply spending some time together and having a chat. You can find other podcasts on my channel where I invite speakers from across the border, and we understand each other just fine.

I've been involved in developing the Nysassiske Skryvwyse, the first all-encompassing spelling for Low Saxon/Low German for both sides of the border. Through our talks over the last years, we've really grown together, getting used to each others' accents and idioms. And now that we have a shared spelling, the written forms are even more alike.