when want play video downloading.
here code
<iframe src="videos/1.mp4" width="540" height="310"></iframe> the result when load page 
what solution play video iframe not video tag?
although browsers might support way of importing video(using <iframe>) browsers act towards video file , attempt download it. correct way display video using <video> tag:
<video width="540" height="310" controls> <source src="videos/1.mp4" type="video/mp4"> </video> see w3schools tutorial here: video tag simple tutorial
