how to add timestamp like a camcorder while recording video

I want to display date/time while recording the video and it should be displayed when we replay the videos like we do it in CCTV video recordings.

Start by reviewing the repository's Android video-recording samples and identify the relevant recording entry point. Clarify the timestamp format, placement, and whether it must be embedded in the video or shown only during playback; done means the date and time appear while recording and remain visible when the video is replayed.

Written by the indexing model from the issue text.