A new video has emerged of Kate Middleton stepping out with Prince William while visiting the Windsor Farm Shop over the weekend. Onlookers felt she looked “happy, relaxed and healthy” as she strolled in the store alongside William without a security team in tow, RadarOnline.com has learned amid concerns about her well-being after taking time off to recover from abdominal surgery. The fresh images showed both Kate and William smiling and chatting as they carried bags full of goods. “I went to my car and as they came out of the shop I just filmed them,” eyewitness Nelson Silva told TMZ while pr…