[midnightmonster]

I think the accent is supposed to make it sound more interesting and memorable. And foreign-ness can help cover uncertain quality: if I have a less clear idea of what perfect deliver would sound like, imperfections may not be as noticeable.

There are several accents I love to listen to, but I don't think I agree with the OP. Anything that makes the audio harder to understand is likely to be a net loss. If I can't get clues from the speaker's mouth because she's an invisible narrator or because the sound and video get slightly out of sync, and if your video is competing with the fan in my over-hot office or the Thundercats video my three year old is watching (he called them "rain cats" for a while), that gorgeous accent may be one difficulty too many.