I've recently upgraded to Windows 10 from Windows 7, and now my Youcam doesn't work. What should I do?

You should check and see if you can upgrade the drivers for YouCam. A lot of things that worked with your other OS will need to be upgraded. Although I couldn't find them for you as they may not be up to date but this site will let you get in touch for the latest updates and you can contact them about Windows 10 driver updates. YouCam Updates | CyberLink

www.cyberlink.com/support/youcam/patches_en_US.html

You can look for the best screen recorder for windows 10 here.