I created a few short videos and tried playing them through the two browsers I usually use: Chrome and Firefox.
The video played—but there was no audio.
I created the videos using the open source program OpenShot Video Editor. It worked great and I exported the video as MP4.
There was no sound in Chrome, there was no sound in Firefox. Hmmm.
I then tried Opera and Safari. Video and sound worked fine in those browsers.
I read on Mozilla’s (Firefox) site that MP4 is not a preferred format and they listed several that were.
Now, I had to turn my MP4 into a playable video that would work across all browsers.
Here’s what I did:
I opened the MP4 file with the open source video player, VLC.
Then, I used the Convert/Stream function in VLC.
I chose “webm” as the encapsulation. This made the file much smaller, as well.
Then, I tried in all browsers, and, as shown, it worked just fine in Chrome. Problem solved!