Continuing my long tradition of superficial answers to this kind of question:
Like a extra-mumbly Swedish with an inexplicable Welsh infusion.
Of the two vids I’ve inserted, the Swedish Chef intonation is more obvious in the news clip, which is more formal and fluent. The Wikitongues vid is more stop–start and hesitant, but the phonetic detail is clearer, which is why the [ɬ] <ll> is much more obvious.