You've spotted a very common native-speaker error. Many native speakers, even very well-educated ones, often slip in an extra 'would have' into the 'if' clause of third conditionals. Sometimes the 'have' is a 'v' sound, sometimes an unaccented syllable ( sounding like "If you'd uv done.." or "If you'd uh done.."). This is not standard grammar in the way that mixed conditionals are, and I would not recommend you copy it. But don't worry if you hear this. It's so common that we don't even notice it.

You'd means you would in this case. It's used when you want to be hypothetical. I don't think it's standard English as you wouldn't use it in writing. It is pretty common in spoken English though.