The video player window has a menu bar at the bottom of the screen.  Mouse over the video window or tap on the window to view the bar.  There is a speaker icon (see image below) that can be muted/unmute and volume adjusted.  There are also more controls to play with.

Direct Link to Streaming the Worship Service

If you are having technical difficulties with the webcast PLEASE let me know.  The best way is to text me immediately at 785.823.0243 or call me (785.823.0243) and leave a message.  I may be busy but will try to respond to your text.  You may also contact me (click on link) and choose “Webmaster”.