TYPO3 Core

The HTML5 Video Tag has the possibility to add a poster image:

<video poster="star.png" ...

This should be an option in the TCA. There are alreay a lot of options available, but poster seems to be missing. I would propose the following scenario:

1. If in the TCA a poster image is provided, take that. If not, check 2.
2. If there is an image with the name as the videofile in the same folder, take that as the poster image (e.g. poster_videofilename.mp4 / poster_videofilename.jpg). This would be mass editing really easy.
3. If there are no poster images at all, do not include the poster="" option in the video tag, just leave it out. The browser will take the first frame of the video automatically.