ManyCam 4.0.52 uses an older virtual driver model. On modern Windows, you must:
It is not "better" – it is obsolete, dangerous, and largely non-functional. If you need a lightweight virtual webcam today, use OBS Virtual Camera (free, secure, updated) or the free tier of ManyCam 7 (which is safe and supports modern apps). Manycam 4.0 52 Old Version
: Capable of recording in MP4 format (specifically for Windows 7 and 8 users). ManyCam 4
If you have a modern PC and patience for configuration, OBS Studio plus the "Virtual Cam" plugin is objectively better. However, if you need a "click-and-go" overlay tool for an ancient laptop, the ManyCam 4.0.52 old version wins. use OBS Virtual Camera (free