php - Iframe autoplay video is not working first time

one text

I have created a php code to autoplay video with sound using iframe.It's only working in chrome. when i open link first time iframe is not loading video with autoplay but when i refresh the page video is loading with autoplay and sound. Below is my iframe code.

<iframe src="https://player.vimeo.com/video/439165184?api=1;title=0&byline=0&portrait=0&color=d01e2f&autoplay=1&controls=0" width="500" height="281" frameborder="0" loop="1" controls="1" allowfullscreen allow=autoplay></iframe>

Please help. Thank you.