Buy stocks. Especially TESLA. They are going to rule the car world. The era of Oil is about to end.
You can alternatively invest in some lithium mining companies, battery/energy companies, solar-cell companies...
I think that making video on youtube or owning website getting paid with Google is the best way and with a low risk.
It's not that easy as the things you name such as making videos on youtube are positioned in a very crowded "market". Nowadays every one is trying to make a huge success out of his/her youtube channel. Only a very few succeed in it.