I Really Like Envato's Content and Revenue Model
First, check out this page:
How to Create a Set of Zodiac Icons in Adobe Photoshop
Envato has created a quality Photoshop "how to" and they have a number of similar tutorials. However, notice the assets they use point to their own marketplace. Envato is giving away good, solid information that also includes some promotion.
This technique can be applied to all sorts of things. For YT videos, I've used the example of growing roses. For this example you would create a video explaining the best plant food for growing roses with details about the nutrients included in the plant food. Then, you provide an affiliate link to the plant food.
Another example is give good advice about creating pottery, then link to pottery wheels, clay, etc.
It seems most folks that want to sell something only create sales or landing pages. This can work. However, by creating great content (that also has a highly relevant revenue stream), it will be much easier to promote that page. You can post a link to it on forums, get links, etc. It's also much more likely that the page with good content will be shared by others on social networks.
For YT videos, these are the kinds of videos that people will watch and embed.
Tons of FREE Public Domain content you can use to make your own content, PLR, digital and POD products.