If you have crypto related youtube videos, then you can rent the Youtube video description here in Bitcointalk.org for example. 0.005btc per month for a Youtube description with link. Many altcoin vbloggers are doing this.
You may also do a review of cloud mining sites (yes I know they are scam) with your affiliate link in the description.
Yes, you can use this option. But for a good income you need to have a lot of views and subscribers, which now is more difficult than before.
It's difficult because there are many youtubers doing the same thing, making videos about the same subjects and only very few of them have followers, all the rest have random viewers, persons who don't subscribe on the channel.
I didn't know about this idea of renting description for bitcoins, it can work, but only for the few guys on the trends of bitcoin videos at youtube.
It is very difficult. We need to create something unique and useful for the rest, then the channel will practically advertise itself.