Starting tonight, Funimation will be streaming Dragon Ball Z episodes 1-15 on their website. This is just the first step in what they say will be streaming of all Dragon Ball shows, including Dragon Ball Kai, online, for free. This is an unprecedented feat for the company.
The DBZ streaming uses the Funimation "Remastered Season Sets" footage. The "orange bricks" as they're often called have video that Funimation remastered on their own, causing the loss of detail. They also blew up the picture and cropped it for widescreen, so there's also missing bits of the picture. They also messed around with the colors so that it's much brighter than intended. The better footage is easily the Dragon Box material, but Funimation has decided to go with this.