Hi.

Have you checked this topic: https://wordpress.org/support/topic/play-video-on-hover ?

Here is a list of plugins from WP you can check out and see if play on hover is an option:
https://wordpress.org/plugins/youtube-channel/
https://wordpress.org/plugins/hover-video-preview/
https://wordpress.org/plugins/youtube-channel-gallery/
https://wordpress.org/plugins/video-player/
https://wordpress.org/plugins/huzzaz-video-gallery/
https://wordpress.org/plugins/video-...ail-generator/

Maybe I'm not understanding something, but it seems like bad design to do this. People can accidentally move the mouse over a hover section and presto- a video starts playing - might be unnerving. It would seem better to make them click.

I know I'm not answering your question but that has been done very well above. Just suggesting you might want to rethink this.

Actually, I would have liked to have had the answer to this question, as it is not "unnerving" to suddenly have a video start playing. It is very helpful for people who simply know what they want and hovering over the image thumbnails to see the quick preview of the video saves time and helps the customer move through inventory easier. It is much appreciated for selling videos and the like. Secondly, it IS unnerving when someone answers a specific question with their opinion of what they think is a better idea. It wastes time and makes searching through threads exhausting and ridiculous to read stupid answers to specific questions.

actually, I would have liked the answer to this question. It is very useful to have video preview on hover.
It is UNNERVING to search through thread after thread only to find answers like this from people who think their solutions are better than the one posted. If you don't know the answer to the question, just don't waste our time trying to answer it.

Try to do your research regarding the theme that you are using.