I capture some footage of a park in a sunny day. Because it was really sunny some of the footage specially the floor(dirt) is overexposed. Is there a way to only fix the parts that are overexposed? When the footage shows shadows like under trees the video looks good, the problem is when I recorded outside shadows. My main concerns is the ground, Is there a way to accomplish this?
Or: you don't mean "parts of a clip over time", but instead "parts of the image". The latter is called secondary correction. If the ground is not really overexposed (clipped - information gone for good), you can select those brightness values quite well with the new HSLR-mask of 10.4.7. In case the ground happens to be as bright as the sky, you'd probably need to add a shape mask too.
meant as an addendum to excellent Axel's advice:
before doing 'complicated' selected CC, test the whole pic, whether a correction is possible anyhow. If 'over-exposed' means 'flat lined' = in the scopes, then no marvel can bring back detail …