Use case: I want to give students a series of related videos, and would like to keep them on the same Page/etc. yet not build a table of video frames or links which could take up Page space.
This process creates a single <iframe> on a Page/etc., within which each of the videos will play when the link is selected. (The process would also work, more broadly, to display any resource with a URI, not just videos as in this case.) The key is having the <a>s reference an internal Canvas link (the *.html docs), which allows the use of the named target attribute (if the <a> references an external URL, target always = _blank).
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Ancient Greek philosopher/linguist; academic techie; enthusiast of sundry pursuits, including eudaimonia, accessibility, cannoli, and kayaking. I can see the weasel after the storm (a classical in-joke).