Open the software from your desktop shortcut or Start Menu. Click on the "Device" menu at the top.
: Free, open-source broadcasting software that excels at capturing legacy USB video inputs.
No, ViewPlayCap is a Windows application and will not run natively on macOS. If you are a Mac user, you will need to find alternative software. Many generic USB cameras are UVC-compliant and will work with the built-in Photo Booth or QuickTime Player via its "New Movie Recording" feature.