  Tutorials are one of the most fundamental means of conveying knowledge.
Ideally when the task involves physical or digital objects, tutorials not only
describe each step with text or via audio narration but show it as well using
photos or animation. In most cases, online tutorial authors capture media from
handheld mobile devices to compose these documents, but increasingly they use
wearable devices as well. In this work, we explore the full life-cycle of
online tutorial creation and viewing using head-mounted capture and displays.
We developed a media-capture tool for Google Glass that requires minimal
attention to the capture device and instead allows the author to focus on
creating the tutorial's content rather than its capture. The capture tool is
coupled with web-based authoring tools for creating annotatable videos and
multimedia documents. In a study comparing standalone (camera on tripod) versus
wearable capture (Google Glass) as well as two types of multimedia
representation for authoring tutorials, we show that tutorial authors have a
preference for wearable capture devices, especially when recording activities
involving larger objects in non-desktop environments. Authors preferred
document-based multimedia tutorials because they are more straightforward to
compose and the step-based structure translates more directly to explaining a
procedure. In addition, we explored using head-mounted displays for accessing
tutorials in comparison to lightweight computing devices such as tablets. Our
study included tutorials recorded with the same capture methods as in our
access study. We found that although authors preferred head-mounted capture,
tutorial consumers preferred video recorded by a camera on tripod that provides
a more stable image of the workspace.
