MP4 is downloading instead of playing

问题

MP4 files are sometimes downloaded, and other times they play in the browser.

What is the difference between these two links?

1) If you open this URL in Chrome, the video will download:

http://video.video-mall.com/video_mall/400241188377_video.mp4

2) If you open this URL on Chrome, the video will play in the browser:

http://www.simplethoughtproductions.com/wp-content/uploads/SimpleShorts/Morning_Mail/morning_mail.mp4

Why is that?

回答1:

First link has Content-Type: application/octet-stream header, while the second one Content-Type: video/mp4.

来源：https://stackoverflow.com/questions/7389378/mp4-is-downloading-instead-of-playing