src="https://www.youtube.com/embed/4jviqNNb9yk?controls=0&modestbranding=1&rel=0&showinfo=0&loop=0&autoplay=1&fs=0&hl=en&enablejsapi=1&origin=https%3A%2F%2Fevents.blinkwebinars.com&widgetid=1" code example

Example: html5 iframe youtube loop

<iframe class="embed-responsive-item"id="ytplayer" type="text/html" width="640" height="360" src="https://www.youtube.com/embed/M7lc1UVf-VE?&autoplay=1&loop=1&rel=0&showinfo=0&color=white&iv_load_policy=3&playlist=M7lc1UVf-VE"
      frameborder="0" allowfullscreen></iframe>

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