Here is what I think, NordVPN is paying crypto you tubers to promote their software, but Youtubers are forcing it on crypto investors neck?
Antivirus and malware softwares protect your PC from viruses and trojans, even malicious malware.
Considering that their ads were appearing in almost every YouTube video, this assumption is correct.
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Or it's better to avoid clicking on unknown links, installing software randomly.
aantonop's
[1] YouTube channel is a good resource for learning the basics.
[1]
https://www.youtube.com/channel/UCJWCJCWOxBYSi5DhCieLOLQ