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Users in general were pretty quick at using the category sidebar. It seemed like users were familiar with the generic media player/browser template that we based inspired our design off of.
Prototype Iteration
Between prototypes, we overhauled how the history bar worked, since that was the biggest design problem for users. We made it more clear that the history bar represented the history by adding a label "Viewing History" and also making visible the just-watched stream in the history bar when the user watches a stream. To make this change visible, we change the stream viewer from a lightbox style viewer (the kind that centers the media in the center of the screen, and darkens the rest of the page) with a simple inline viewer. We also made the decision to have new streams added to the Viewing History bar to the right side of the last item in the style of a video playlist. The feedback we received said that this was the most intuitive way for history updates.
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