OBS Studio is a compositing tool, that is compose (mash up) different sources into a single video, with lots of complexity that comes from powerful flexibility
For simply recording a single camera, OBS Studio is likely overkill.... maybe not, but certainly NOT where I'd start
Personally, I'd use my DSLR and record on that.. much better optics, etc.
What you must determine is what quality level you consider acceptable? for some folks, recording on a smartphone is 'good enough'... for others, that quality would be considered awful...
Regardless of OBS Studio or other application, you still have to enable 'viewing by the recroding device (computer or ??)' of whatever content you want.
- So you'll need a camera of some sort. cheap webcam's often are fixed focus and would look terrible trying to record a classroom (as everything would like be out of focus). There are flexible focus webcams, but they are more expensive... you'd have to find a camera that will focus and the distance (camera to person /whiteboard) you need to record
- beware low light performance requirements, and white balance adjustments due to classroom lighting, including possible LED light flicker
- then there is picking up the audio. most webcam mics are terrible when picking up a larger space and multiple speakers (classmates) ... depending on your distance, a shotgun mic may work better.
Some teachers prefer to use devices like DSLRs for better quality. Also, if you have a heavy workload, services like
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