Bringing albums to YouTube!

Something of an exaggeration I expect. Y/t has been the wild west of the internet for a long time but common sense suggests that just uploading music without the licence or band approval may attract attention and not in a positive way. Also I doubt you are the first to think of such a thing.

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I had a similar thing happen. A few years ago, I took a video of family on Christmas and there was some music playing in the background. The youtube detectors quickly identified the songs as copyrighted and demonitized the video. They never took it down though. It was an unlisted video and the only people who could watch it were those people that I shared with link with. Didn't matter to YT

Just me and my big mouth!!!

No. It all depends on the attitude and action (or lack thereoff) of the copyright holders (or worse: rights management businesses/catalogue holders, because they smell money in everything). When you are posting/publishing - on youtube or elsewhere - copyrighted material without the authorization of the copyright holders you are infringing their rights and so you are liable.

That said, and especially when you are not monetizing other peoples' works, at the worst you receive an angry letter/mail (by a lawyer, to make it look serious) asking you to delete the publication, "or else..." And when you delete the work in question it will remain at that. If you are monetizing other peoples works things could get a bit more nasty: other than paying what you gained to the right holders, a nice fine might top things of. Now, this can all be slightly different according to the country you or the right holders are in (copyright legislation is not harmonized on a world wide level, even if there has been some convergence these last decades).

With this in mind, and in order to react to the OP's question, I wouldn't be too worried to put more or less obscure music on youtube (while not monetizing on it). In the worst case you receive that mail/letter requesting you to delete it. In the best case right holders will not manifest themselves (for whatever reason: too complex a rights situation from the start, bankrupt companies, old and forgotten things, they're all dead, nobody cares, etc., etc.).