The video delay is not impossible. It's not cheap, either. The link I put up goes to a site that has a video dealy adjustable up to 2 seconds.

 

So, what would it take to delay a video signal for just one second?
Looking at my display adapter settings, I'm using 1024x768, 32 bit color, 85Hz refresh rate. Not all that fancy by today's standards.
To delay for one second, one would need to store all of the bits of all of the frames (85 of them)

That turns out to be 255 megabytes exactly (3MB/frame), with no compression involved, for a 1-second delay.

So if a PC had a couple of video cards, one of which was capable of video capture, and a program written in C++ or assembler that would keep track of a rather large FIFO array in real-time, moving video data at a rate of 510MB/sec from input->RAM->output, I suspect this could be do-able.

But, I've never written anything in x86 assembler, and my C is mighty rusty, along with my mainframe assembler (which bears little resemblence to x86 asm) - so that'll be a project for someone else.