How to upload a youtube video with copyrighted music

I wrote to the video clip bureau and they said that I should pull down the video or pay the $1000's of dollars in licensing fees, so I volutnarily pull down the clip. YouTube alerted me to the situation, but said it was not pulling the video down for the time being. Someone actually made a video for me using BBC or Getty clips I think, which you normally have to pay for. YouTube detected this but did not pull down the videos or my account, all they did is tell me and not let me gain adsense advertising dollars on those videos. I have some videos now that include copyrighted material. I don't think it is a simple, 'you will lose your account if you post copyrighted material'. I know some question might even be foolish or without reason, but maybe there is something new to learn.

Is maybe the better way to ask that 'company' before doing the upload? Does it happen that, that company doesn't answer me never? What will happen if that company changes their mind?!! My videos will get blocked? And, the companies which has the rights, find out that that video is being broadcasted by a user which doesn't have the rights! But how do I know for example, that a studio wants that I upload their movie, and this means the same as I have the rights. I know that has to do with the ID matching also. But after some time, they get blocked due to copyright infringement! There are some videos, that after uploading they work perfectly. So, I wanted to know, if there is a way to check your videos for copyright, before uploading them to youtube? As many of Youtube users have seen, their videos are being wipe out, and their channel being blocked due to copyright infringement!

How to upload a youtube video with copyrighted music