Most affiliate marketers put up the ads only on their sites. There is nothing wrong with this approach but know that there are many other traffic sources that you can tap into and promote the products simultaneously. The more targeted traffic you can send to the sales page the more your chances are of making money.
Affiliate marketing also is a type of online performance-based marketing in which a business pays a commission to one or more of its affiliates for each visitor or customer that visits their website via the affiliate’s website through a custom link.

Hopeful affiliates may want to try paid advertising if they’re hoping to speed up their influence. While organic content is always better — because you’re building up an audience based purely on your words and talent alone — it will take longer to do. Facebook and Google ads can be expensive, but they’re typically the fastest way to get a new venture off the ground.
For example, one of your videos is related to the food niche, and the other video is about antivirus software means, you won’t get enough trustable subscribers to your channel.