Below you will find some suggestions for troubleshooting your audio/visual issue:
If you have low or no sound, please check:
Are your speakers on? (At some point, we all forget to turn on our speakers.
If you have checked that your speakers are on, please check that the volume is turned up on your device.
If there are blue bars at the bottom right of the video itself, have you slid them all the way to the right so that the sound is maximized?
Have you tried using earphones to eliminate ambient sound?
Do you have any "add-ons” installed on your web browser? This can disrupt the playing of a video. If you are unsure, just Google "how to turn off add-ons in [whatever internet browser you use]?”
It's a remote chance, and the issue may be your sound card; to locate the issue watch this video
If you are still unable to access the audio or video after trying all of the suggestions above, please email firstname.lastname@example.org for additional help.
Note: Adobe is no longer supporting Flash Player and they recommend uninstalling it.