Those YouTube views mean different things to different people. For some people they're worthless, for some people each one is worth a fraction of a cent. Doesn't sound like a lot, but it adds up.
I've met people that are YouTube partners that post a video or two a week and are making enough to live on, more than they were making at a full time 9-5 job (not doctors or engineers, but regular middle class work that pays the bills.) A few of them have gone on to make $100K+ a year. A lot of them are doing product reviews so they get everything they're reviewing from companies for free and then reselling it, not a bad hustle. I doubt that any YouTube channel will last forever, but music can be just as fleeting.
YouTube celebrities can get 1M+ views per video... I've heard that's worth about $4,000 per video if they're YouTube partners & their subscribers watch their videos regularly... and that's in the form of a monthly paycheck, not just a surge of money when an album drops and fades over the next year or two until the next album is ready.
Anybody with a computer can pirate software to make beats and videos for free now so nobody has to invest anything but their time. There's very little risk with the possibility of a very high reward... If it doesn't work out, oh well, no money lost, but if it catches on they might get a Kreayshawn deal or start making Lil B money... He has over 100M views on YouTube & is doing shows, and I don't think he's released a physical album that you can find in a store in over five years.
As far as Facebook Likes go, I don't know that they provide any money directly, however, every time someone Likes one of your videos it's back at the top of everybody's feed again, giving anyone that missed it the first time another chance to watch it.