There are basically three different “r”s. There’s the one with the tongue at the bottom of the mouth, one where the tongue flicks the top/ridge behind the the teeth and one where it’s rolled (there are actually a few more but down low, up high and rolled are good general descriptions).
English loves the one where the tongue is down low. Most Scots I’ve known tend to use the one where the tongue taps the roof/ridge, especially when speaking in Scots and in Gaelic. That’s the one you’re hearing here.