No Video Thumbnails

Video thumbnails appear to not be working properly.

Looking at your own demo site, no video thumbnails show. https://github.com/kylemocode/react-lite-yt-embed/issues

<img width="691" alt="image" src="https://user-images.githubusercontent.com/46997/216648034-6d9322a3-e99f-4c1a-a0dc-bccb35476e40.png">
