Dear @Elsa-Leguevaques
Try adding the following code:
<script> window.laytheme.on("newpageshown", function(layoutObj, type, obj){ jQuery('video').attr('controlslist',"nodownload"); }); </script>Within the "custom <head> content" of Lay Options - Custom CSS & HTML
Screen Shot 2020-09-14 at 2.51.54 PM.png
Best :)
Richard