Soundcomparisons.com is a great site for listening to how a certain word is pronounced in different accents of English from all over the English-speaking world. Is there a site like this for French? That has the possibility to listen to the same word or the same sentences in different accents of French. It does not have to cover all French speaking countries. I'd be happy with just France.
You may try accents de france for accents from France.
There are much more differences with Quebec, Switzerland, Belgium, North African and Central African countries.