Crackle is a streaming service that offers movies and TV shows for free. It can be watched on a computer or a mobile device, but it can also be streamed to a TV. To watch Crackle on a TV, the first thing you need is a streaming device. A streaming device is a small box that plugs into your TV and allows you to stream content from the internet. The most popular streaming devices are the Roku and the Amazon Fire Stick.