奇怪的是，对代码进行了很小的调整即可解决该问题.

Strangely a very small tweak in code fixes the problem.

使用DOCUMENT_ROOT不仅可以解决$videoPath = "/path/to/file.mp4";问题，而且还可以解决此问题.除了该文档代码是完美的.

Instead of just $videoPath = "/path/to/file.mp4"; using DOCUMENT_ROOT solves the issue. Other than that code of documentation is perfect.

$videoPath = $_SERVER["DOCUMENT_ROOT"] . "/mapapp/videos/test.mp4";