COLUMBUS, Ohio (AP) — Experts disagree on whether it's legal to use footage of a great-grandmother who opposes Ohio's new collective bargaining law in an ad defending the law.Marlene Quinn's great-granddaughter was saved from a house fire in November. Quinn shared the story in an ad from We Are Ohio, the union-backed coalition fighting to repeal the law.Building a Better Ohio recut the footage for their own spot claiming the law will help, not hurt, firefighter staffing.Professors at Ohio State University Moritz College of Law say the woman thrust herself into the public debate by appearing in the ad, and her use in the opposing ad is OK.However, the director of Pennsylvania's Annenberg Public Policy Center said that because the footage came from a YouTube video, it could violate copyright law.YouTube didn't immediately comment.