nikolas

@dependabot rebase

@dependabot rebase

@dependabot rebase

Done-ish. Need to support Vimeo here.

Also TODO here: * Better image URL input validation * Data URLs: Should we support these with an unlimited-length TextField? I'm kind of thinking no. And if not - how...

Input validation done, just not fully QA'ed. Currently, thumbnails aren't properly set when importing external videos.

Looking at all the customizations we have for this table here, this will be somewhat involved: https://github.com/ccnmtl/mediathread/blob/master/media/js/src/CollectionListView.jsx#L48 I hope it's straightforward-ish, though. Feel free to open up a work-in-progress PR...

This is proving to be pretty involved to change, actually. And I did notice that our existing setup does use ARIA elements like role="table", role="columnheader", which should allow screenreaders to...

Copied from my note on Natalia's PR here: #4675 So, after looking at this problem from a few angles, (I even have a branch [here](https://github.com/ccnmtl/mediathread/tree/data-table-semantic) that updates the existing library...

@dependabot rebase