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The media player will render captions for videos accompanies accompanied by a WebVTT captioning file.
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TDL has refactored the DSpace templates to use to use the primary bitstream of an item when determining what to display in the thumbnail space. If the primary bitstream is an audio/video file, then the appropriate media player will be displayed where the thumbnail would ordinarily appear in the Brief Item view. And if not then the regular thumbnail logic will apply, i.e. if there are additional files then the first will be selected and the corresponding thumbnail image for that file type will be displayed.
The new logic can best be explained with examples. We have a created a test collection on our training DSpace instance (https://training-ir.tdl.org/handle/2249.1/26171) that allows you to explore the various scenarios that are likely to be encountered when dealing with audio/video bitstreams in items.
The titles of the items in the test collections speak for themselves, but the key takeaway is that in the new templates an audio/video file *must* be set as the primary bitstream of an item in order for the media player to be displayed. In any other scenario, even if it is the only bitstream of the item, the regular DSpace template will be used to determine a thumbnail. This means that in items where an audio/video file is the only bitstream, we will you will need to make that file the primary bitstream for the new template to work properly.
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