The point about being a business is valid. If you generated the income without an employer arranging to pay taxes, you are basically self employed and will need to pay self employment taxes. Basically it's the portion of social security tax your employer normally pays for you.
The good part is that you can write off the cost of your computer over time and also subtract your expenses directly from your income, which will likely drop your income to near zero at this point. Drank a coke while uploading the video? That could be an operating expense if you document it properly.
The biggest negative for self employment in our current tax system is that unless you file a really long form proving that your income is variable over the year, the government expects you to possess magical powers and have extra cash laying around, so you can predict your income for the whole year and pay taxes IN ADVANCE throughout the year. For example, if you make zero money January through June, but get a self employed job from July through October, the IRS expects you to have known this in advance and will fine you if you didn't pay 1/4 of your expected taxes way back in March, before you even had the job or even before you had any money to send in at all. If you don't, even if you send in plenty of money later after you have the income, they will fine you and charge you interest on the money you didn't send in for the March deadline and probably June too. This has been the biggest pain in my A$& for the last 7 years, since my wive has had a variety of self-employed contract jobs every year so her income is extremely unpredictable. I've solved it by simply massively overpaying my own taxes throughout the year, but that's really inefficient.
If you make enough money to feel like you need to file taxes, you might want to admit defeat and join the millions of other oppressed subjects of the realm, and hire a tax accountant to do your taxes. This ought to be trivial for any tax accountant and should take them less than an hour, so it won't cost more than a couple of hundred bucks (which can be subtracted from next year's income as a business expense). I really don't know if the 1040EZ allows for self employment income or if it does, what the upper threshold is that would require you to file the long forms. The problem is that the worksheets deducting expenses are some of the long forms...
Or you can try tracking your business income/expenses with something like quickbooks, and use turbotax which will step you through filing self-employed taxes. Turbotax will cost you about $60 if I recall correctly, which is anywhere from half to 1/10th what an accountant would probably charge you. The downside is that turbotax might not get you the same results as a tax accountant especially if you might owe fines for things like not having a magical prescient unicorn and big pot of gold to pre-pay taxes throughout the year. You get one free year exemption from that fine and possible exemptions from that fine if your income varies greatly from the previous year, but turbotax isn't always so good at identifying when you might NOT have to pay the fine.
