App with Video Delay?

I am looking for a app which allows you to watch your camera but with a delay.

Usecase: Film myself while training and watching the screen a few seconds later shows me what I did.

Bonuspoints for free/open/libre apps...

2 comments

Couldn't you just start a recording on your regular video camera, do the training, stop the recording and then play it back?

I'm not sure this warrants a different application, to be honest.
This is very roundabout and only 1/4 serious... but you could maybe even earn some pocket change becoming a cam-person. Stream with device, with the app backgrounded, and watch the stream from your web browser. There is always a built in delay of a few seconds, and you can make money/get internet bullied.