I tried a bunch of "open" tools last week, but turns out they are a paid tool in disguise most of the time. I eventually paid for CleanShotX for my work and have peace of mind because it just works. OBS is IMO much more stable and aimed at live streaming anyway.
ShareX has been around for ever but just updated the UI and now super easy to do capture work with annotations and cam output etc (no studio but it's light weight)
btw I use OBS virtual camera its one of my fav features with masking etc for a video avatar vlogger effect
https://getsharex.com/