Hi @bluetroop2,
Thanks for reaching out.
I have checked your website and found the issue you described. I have checked the specific video by playing it in the browser and it shows nothing, I have also tried to play that video through the Media and it shows the blank screen while playing.
I have downloaded it and played through the video player like VLC and it worked, but while uploaded to the Media in my local server it react exactly the same and shows the blank screen. I went ahead and uploaded two separate sample videos and it worked fine.
It seems that there might be some problem with that specific videos only.
Thanks