Are you looking for a HTML5 mousewheel controller? That to control your audio of the HTML5 video player? You can use the Turn Off the Lights Browser extension to get this experience on all the HTML5 videos on the web. With a scroll up or down in the video player element it increase or decrease the volume. You see a visible meter indication that it is changing the volume by each scroll by your mouse.
Steps to enable the HTML5 mousewheel controller
To get this HTML5 mousewheel controller in your favorite web browser such as Google Chrome, Firefox, Opera, Safari and Microsoft Edge. You must install the Turn Off the Lights Browser extension. And enable in the Options page – Advanced Options the Video Volume Slider.