Has anybody had this experience? My WordPress (WordPress 5.4.2 running Twenty Seventeen Child theme) has an XYZ Code Snippet that echoes
do_shortcode('');
but somewhere in the process, a four character string is added to the end of the src so that I get
Media error: Format(s) not supported or source(s) not foundDownload File: https://mywebsite/wp-content/uploads/securepdfs/C0112.mp4?_=2
when the page renders.
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Answer
The problem was not the appended string; the problem was that the two mp4 files that had been uploaded were both over 1 Gb in size. Once I had converted them down to a more realistic bit rate and got the sizes down to below 50M, the mp4’s rendered successfully.