You are talking about Laura Wasilowski at The Quilt show with Alex Anderson. The cutting on the bias is to make the leaves flexible for bending, and it works!!
The show is free for everyone all the time. Go to www.thequiltshow.com and on the right hand column there is a link for free show. You can also sign for free as a basic member and receive notifications when free shows become available. I think this weekend Carol Doak's show is still free, but don't quote me on that.