Is there a consumer-level program that mimics Scratchbox??

[Joel Cairo]

I've got some video restoration to do on old kinescopes that have been transferred to video, and I know that pro-level folks get to use this tool, which essentially buffers two video frames,and allows you to use a stylus tool to scratch out flaws on one (essentially by revealing the second video frame underneath, which presumably doesn't contain the same flaw), then save the corrected frame to the original video file stream.

But is there such a tool as this for those of us on a more, shall we say, realistic budget? Or am I just asking for too much?

Thanks for any help, folks!

-Joel Cairo