Expression Encoder 3 encodes a timestamp into video source

Question

I have been recently using C# .Net and EE3 to write an application to capture video from a live stream, and store the output file into my local harddrive. Now, when it comes to the the video playback stage, there is a new requirement of displaying the recorded date time in real-time just like what we normally see in a security camera video playback.

I'm thinking the only way to do this is to write a plug-in to add the date time in the encoding part, but I don't know if anybody can suggest a better way of doing it?

Thanks