Well, asarlaí posted a few, but do you bean the BBC site blas that has the Giota Beag lessons on it? If so, you are definitely dealing with the Munster dialect there .... as an example, you'll hear the "moy" for maith as opposed to the Ulster dialect where you'll heare "my" for maith.
It's been a long while since I listened to Giota Beag, maybe if you tell me which lesson you are hearing the discrepancy with the bh as w versus v sound I could go listen and try to help out.
I should probably post a disclaimer on my posts
that I am also a learner:
Tá mé ag foghlaim Gaeilge ( I am learning Irish) and that just because I post something surely does not make it correct and that other opinions ought to be sought. I'll always tell you when I am pretty much sure of something, though.