Thumbnail of MP4 and AVI

I’m not sure how INFUSE get the thumbnail of MP4 and AVI. But even I use a tag editor to put a thumbnail into a MP4 file (I can use file explorer to see the thumbnail), but I still cannot see it in INFUSE. I also try to clear cache, but it doesn’t work. Is there any suggestion?

If you want to use embedded images, you will need to enable the ‘Embedded Metadata’ option found in Infuse’s settings menu.