One video on my webpage often plays unexpectedly, despite my coding to prevent this

The third video on my page, https://mindbluff.com/empathy-videos.htm, often plays unexpectedly when the page loads. The html code follows below…

embed SRC=“x-bookmark.mp4” WIDTH=“450” HEIGHT=“550” AUTOPLAY=“false” controls preload=“none” CONTROLLER=“true” LOOP="false”

…I know only the basics of web design using html, and very little using CSS. If there’s a simple fix (preferably using html) to the above code, I’d be thankful.

so why are we using an embed rather than a video tag for a local video file?