Ask HN: How does web archive work?

Hi I am looking for information how do I find a archived video? It got posted on Google+ and I can't find it now since it got deleted. Is there anyone can help me retrieve some videos I wanted to archive I lost a lot of stuff and the site I am looking for has some snap shots but the videos are black and I can't get a successful redirect. If anyone can help me out through a message or email feel free to post it. I can pay you out if successful.

Thanks.