Video only records 40 seconds

check to make sure the settings don't limit the video for mms

If you want a video recorder that has no time limit, I recommend AceThinker Free Screen Recorder Online. This tool is absolutely free and very easy to use. Unlike other screen recorders, it doesn't leave any watermarks and allows you to record with audio without any time limitation. I always use this tool when I am recording my screencastings in Youtube. I hope this tool will be able to help you in your video recordings. Thanks!