adding "share to instagram" button for embedded video?

Site URL: https://www.symmetryproductions.net

Hi all,

I'm a complete beginner so I'm not even sure if this is possible to do. I have a wedding video website, and I use an embed block to show my clients their film, Ive figured out the html code for that. I'd love to add a direct share to instagram button either below the player or as code in the embed block, can anyone help with this?

This is the code block I'm using to embed my video (I've removed actual video links):

<video width="100%" controls controlsList="nodownload" poster="https://filedn.eu/CLIENTVIDEOPOSTER.jpg">
<source src="https://filedn.eu/CLIENTVIDEOFILE.mp4" type="video/mp4">
</video>

Is there anything I can add to this to achieve my goal? I'm trying to learn more html but my time is super limited so I appreciate any help I can get!

Thanks,

Derek