My languages are Belarusian (native), Ukrainian (C2), Polish(B1) and Russian(C2).
These are all Northern Slavic languages, but I get a basic idea of every Molise Slavic sentence in the main video, as well as in this one https://www.youtube.com/watch?v=4_NtgtnAtIs.
I'm sure it's easier for people speaking any south-west Slavic language though:))