Same problem here.

I been searching for a solution, but I have only a partial fix. The first time you enter to the url from the description of the profile on instagram all work with the following simple code.

<script>
    //trigger autoplay video, define video ID to target play action
    $( document ).ready(function() {
        $("#videoclip").trigger('play');
    });
</script>

If you refresh or navigate on the website, and after return to the home page the video don't show up. I have tried everything, simulating click on button to play the video, deleting the autoplay tag and then calling play action with Javascript, but all is blocked but the autoplay policy of the browser.

My understanding was that if the video is muted, it does not violate any autoplay policy.

Check the profile of BMW Spain on Instagram, inside the linktree in the section "NUESTRA WEB" the video of the website is not autoplaying: BMW ESPAÑA Instagram