Reactions is a fantastic YouTube channel that science teachers should bookmark. Reactions is produced by PBS Digital Studios and the American Chemical Society. The purpose of the channel is to teach viewers about the role of chemistry in the things they may see in everyday life. For example, earlier this year they produced a video about the chemistry of gluten and a couple of weeks ago they published a video that explains how milk becomes cheese.
Try one of these tools to make a flipped lesson based on this video.