Can we use the same affiliate links in the second youtube channel?

I tried searching on google but couldn't find the information. Can we use the same affiliate links on a second youtube channel in the same niche if it's not considered spam?

You can use the same link but how would you track the links from different channels? Better option is to use different links.

yes, that's not a violation and won't be considered as spam, but as suggested above use tracking parameter so you can track the conversions and understand who comes from where, also a good practice is to wrap the affiliate link with shortened link, this way it is not so obvious that it's an affiliate link also you don't want competitors to understand what you are doing exactly