Suggestion: select area to record and display video with

Since videos take alot of bandwith, it would be great if its possible to crop exactly the area we need app to show and record. this way it will help finish uploading data video faster capturing exactly area of interest and also gives more privacy, since feeding moms in most cases are included in the main camera area and they have to breastfeed babies, and those video pieces could be sent to your servers which make user less secure because you can never trust videos not falling into wrong hands.