Anyway to get a firmware mod to turn on date-time watermark in VIDEO?

For both practical and legal considerations is there any chance of getting a minor firmware mod for the peephole video cams (and other models) that will give us the user option to enable an embedded date-time watermark directly into the imagery data (at a location we desire - e.g. top, bottom , left, right etc.)? For legal reasons the police etc. need proof of date-time in the downloaded and saved video so that they know its not edited and shows actual time clock. It's also just practical for us subscribers to see the date/time DIRECTLY in the imagery wihout having to run the app and computing in from the base date in the app + the time offset counter. Really really would be useful and super easy to do. Please do it for us. I don't want to have to turn over my app to anyone in order for them to derive the imagery date-time stamps from app info. I want to be able to copy it out to a file and have it all contained as part of the imagery. Thanks - and great product by the way. TropicalJim