This page lets you create a mp4 file on my server of 10 seconds of video and sound, which you can after encoding has finished download from this page.

Click on the below link for the previous capture

capturing and mp4 encoding 10 seconds of video and sound ...

done, result in www.theover.org/Bird/camc.mp4 Reload this page (once only, and after the previous capture ended!) to start a new capture.