I don't think Tom Scott ever promoted a VPN product in a YouTube video. He's actually quite selective with his brand deals. From his contact page regarding ads:
* If you're asking about pay-per-click or pay-per-lead advertising, the answer will be no. Please don't ask.
* I do not review products or apps.
* I am unable to accept sponsorship from apps or games that contain microtransactions or gambling.
* If you're asking about pay-per-click or pay-per-lead advertising, the answer will be no. Please don't ask.
* I do not review products or apps.
* I am unable to accept sponsorship from apps or games that contain microtransactions or gambling.
Source: https://www.tomscott.com/contact/ads