Ability to embed video and generate thumbnails

[Bartixxx32]

Hello, this script is great, but when comparing it to inbuild telegram export feature (whih is slow and unefficient) i very miss embeding mp4 videos in page, i mean by it the thumbnail. Im have small knowrgle about html, but im almost sure editing template.html would not help due thumbs missing :/

It would be cool to see added this option to script :)