I'd say find a CPA affiliate program related to your niche, and use that affiliate link in the video description.
I recommend You to see this list of CPM affiliates. The first one from the list pays up to 1.80$ per 1000 impressions of popup if Your traffic is US/UK based. Other countries have lower rates. They pay by Paypal, twice a month, with a minimum 100$
but then you can't save your description video with any html code i think, at least it doesn't let me save when i put "<", ">", you can monetize it if you have an google adsense account.
You can use many different youtube monetization methods like CPA offers, Affiliate offers or you can even apply for partnership and earn from youtube itself.
Sometimes YouTube is often overlooked as a money maker. But, considering that it is the #3 most visited site in North America it isn't a mechanism that should be overlooked. That level of traffic can make most wonder what good options exist for that market. Affiliate programs are a great way to use this source. Affiliate links partnered with a well trafficked video can really be very successful.
1 or 2 years ago Youtube was a perfect site for people to advertise their affiliate links.... now... forget it, dont bother! As the economy got worse, more people got fired, and wanted to make cheap easy cash online... and whats the best way to do this... spam Youtube with your videos promoting your link.... These days youtube is spammed so much my videos dont even get views LOL!!! Ive seen ONE guy spam his "mw3 prestige hack" video 50 times.... thats just ONE person you have to compete against!! Although, if you truly are gettin 100 000 views then I would take advantage of it, but be aware it only takes 1 guy to flag your video and then your done for....
Economy is Bad, thats means world is came to end??? huh??? For me its a "Keywords" thats drive more traffic to your Youtube.