Tip: if you have a video you want to start from, say, 26 seconds in (to skip a count-down timer) but you don’t want the video to skip to that time mark when it loads – because you want the poster image to display, add:
preload="none"
To your video tag and, append #t=30 to your video src. e.g.,
<video controls="" preload="none" src="https://player.vimeo.com/progressive_redirect/playback/750091408/rendition/1080p/file.mp4?loc=external&signature=da723a39ea8edd5171ea09d082ec596c16034d894c0257f566555cfa2d72bbba#t=26" poster="./poster.jpg">
</video>