YouTuber cracks cold case, transparent TVs & AI small biz tips

Plus, I continue with the best of CES 2024. We've got everything from Samsung's ultra-flexible flip phone to a smart cat door that keeps out rats. You won't want to miss these. Want to make more while spending less? I've got the lowdown on Facebook's Buy Nothing groups and a unique tip: turn your backyard into a money-making dog park!