How to remove grey outline / overlay on looping video code block (only shows on mobile)

Hi there, I found the following code in a youtube tutorial for autoplaying and looping video in squarespace. It shows up fine on desktop, but on mobile the video has a grey outline / boundary or a grey overlay (differs on Android / iOS). 

This is the code I'm using as a code block (video URL removed for now - it's the URL generated when you upload to 'manage custom files')

<center> 
<video autoplay=
autoplay" loop="true" width="100%">
  <source src="VIDEO LINK GOES HERE
" type="video/mp4"/>
 </video>
 </center>
                         

Any ideas how to fix this on mobile? Note - I don't code so please make any technical instructions simple 🙂

Thanks!

@tuanphan I spotted you are somewhat of an expert around here so hope you don't mind me tagging you 🙂

On 5/28/2021 at 4:06 PM, precioushb said:

@tuanphan I spotted you are somewhat of an expert around here so hope you don't mind me tagging you 🙂

Can you share link to page where you added the code? We can check easier

Thanks for replying. Sorry not public yet so won't be able to...

You can setup site access password & share url

FYI and for anyone with the same issue, this seemed to fix it:

https://stackoverflow.com/questions/52508598/html5-video-element-on-iphone-has-border#new-answer