Move a pdf and linked files to a new hard drive

I am creating a pdf file from Indesign.

I open the pdf file in Acrobat and insert a link to a video (mov) which is in the same folder as the pdf file. It works fine, but when I move the folder to another hard drive, the link points to the full address of the location where I created the pdf file. I want the link to only contain the name of the video because both the pdf and the video are in the root of the new hard drive.

How can I solve this problem?