Copy link to clipboard
Try rendering the timeline by clicking the Render button along the top of the timeline or by pressing the Enter key.
Once that yellow-orange line above your timeline turns green, it should play smoothly.
Although it does not look like the Work Area Bar covers your movie. If your timeline does not render, that is likely why.
Go to the programs Preferences (under the Edit menu on a PC). Go to the Audio Hardware page and change the input and/or output settings.