FYI something else that might be worth looking into (which I happened to implement for iXForms) is allow clickable URL links in question hints. eg
<input bind="hintlink">
<label>Hint with link</label>
<hint>For more information see <a href="http://en.wikipedia.org/wiki/XForms">Wikipedia</a></hint>
</input>
Although I'm linking to an actual web page above, with a bit of cleverness (and appropriate URL) you could easily have the link refer to an on-device media file, eg image, movie, HTML document, PDF, etc that is associated with the form.
Moved this from a Support thread since its basically proposing a new feature - one I've implemented in iXForms, and which I think might be a useful addition to Collect.
FYI there is an existing URL widget that accomplishes a similar result, albeit outside of a hint. So adding this feature probably isnt so compelling... Thnx @yanokwa !
Thnx for link. It seemed like a good idea at the time, but I'm inclined to deprecate mine (too). Its a real nuisance to handle embedded URLs in the XForm to prevent them throwing my SAX parser off when processing form definitions. Far easier to have markdown in the label/hint strings and parse them appropriately when displaying the form much later.