Steps to reproduce the issue

• Make sure video files can be uploaded (legal extensions, MIME times). Let's the media folder is www.mysite/media
• Create any sub-folder in main Media folder (for example 'myvideos')
• Upload a video to this new folder, so the correct location is www.mysite/media/myvideo/myvideo.mp4.
• Hover the mouse, notice that the lacking sub-folder part (www.mysite/media/myvideo.mp4)
• Try to click the preview link, get the error about file not existing or not supported format.

Expected result

• The link to the video file should be resolved to the correct location like for images ( www.mysite/media/myvideo/myvideo.mp4 )

Actual result

• The link is broken (lacks the sub-folder part) ( www.mysite/media/myvideo.mp4 )

System information (as much as possible)

Additional comments

The bug is easily fixed by correcting the file
\administrator\components\com_media\views\medialist\tmpl\thumbs_videos.php
by replacing
<a class="video-preview" href="<?php echo COM_MEDIA_BASEURL, '/', rawurlencode($video->name);
with
<a class="video-preview" href="<?php echo COM_MEDIA_BASEURL, '/', rawurlencode($video->path_relative);

path_relative is used by the image link machinery, but mistakenly missed here with videos.