If you're short of money, just buy 1 single .com generic and short domain. Like this:
123link.com
Then install a blog on that domain and install the "pretty link" pluggin, which allows you to create unlimited custom cloaked links.
If you want to promote a weight loss product your link can be:
123link.com/weight
If 2 weeks later you want to promote a make money product, you can use the link:
123link.com/money
And so on.
Just make sure the short .com domain is REALLY short (like 4-5 characters). Otherwise, you can become "trackable" for both youtube and your competition.