The iPad is a solid video-playing machine. But you have a whole slew of choices when it comes to finding and watching videos on the new tablet. Which is right for you? Let's explore your options.
Load Videos From iTunes This is the way Apple would prefer you do things, as it would presumably involve you paying them for the videos you're watching. It's probably the most idiot-proof way of watching TV shows and movies (provided they're in the iTunes Store), but it's also going to fill up your iPad's hard drive really quickly. If you want to load the iPad up with your own ripped or downloaded videos, they'll need to be 720p or less and in h.264. Check out Joel's in-depth post on this very subject for more details on that.
Air Video App This great app is the perfect solution for people who store lots of videos on their computer but want to watch them on their iPhone. And an iPad version is currently awaiting review from Apple. When it's approved, it will probably be the best option for watching downloaded or ripped videos on your iPad without stuffing the hard drive.
YouTube App The iPad's built-in YouTube App clearly will let you watch YouTube videos on your tablet. Of course, full TV shows and movies aren't really what YouTube is all about, but for music videos and other standard YouTube fare this is clearly where you'll head.
HTML5-Supporting Video Sites Vimeo is set to work on the iPad thanks to its conversion to HTML5. Flickr, too. CBS is also currently testing its streaming content in HTML5. And hey, Gizmodo's own video player is now HTML5-friendly, so those videos will play on the iPad as well. With other sites such as the New York Times, CNN and TED switching to an HTML5 video player, there should be plenty of options for you to view web-based videos inside of Safari.