No, you shouldn’t say you’re sponsored by vidIQ. Sponsorship implies direct financial compensation, which is different from an affiliate relationship.
You should disclose your affiliate relationship with vidIQ where relevant and required by regulation (if you’re not sure, disclose!).
A typical disclosure could be by posting a sentence like this in your YouTube video description:
“If you purchase something after clicking on my vidIQ link I might earn a small commission from that.”