Hetenko drat The video thumb is just a direct link to the mp4 file so it should play in any modern OS/browser combo. However, if you’ve got an ad-blocker or have the browser set to not automatically play videos, that would stop it but you’d be told and could opt to play it.
The file is stored locally and we’re not paying for a huge fat pipe so it might take a little while to buffer on your device but should start playing before 15 sec.
You can always try right-clicking the image and downloading the video to play locally.