generally speaking though, st3ady, you should never just take an edit that was provided for you. Instead you should study the edit and try to replicate the techniques you have learned through it. If you were to just use someone's edit, you have not learned anything that the edit was made for.
If you *do* decide to use it, and you have permission to (as is the case here), it no longer is your sole work. It would be considered more of a collaberative project between you two and you should give them credit wherever you post it (whether it be in your portfolio, or what have you)