Windows/Mac/Linux: YouTube's great for watching videos, but it's not as easy as flipping on a TV. Minitube gets you closer to that experience and pulls videos based on keywords into an endless stream.
All you need to do is search for something and Minitube automatically starts playing videos from YouTube for you. It uses keywords to match everything up and does a pretty good job of keeping you entertained without recycling videos. Minitube also has a lot of different features for basic YouTube watching, including a Flash-free experience and channel subscriptions. It's a bit pricey at $10, but you can check it out for free.