I think one of the things you will have to contend with is members that are worrying about the possibility of downloading infected files. That issues exists regardless of what Virus Total shows.
Though I will not be downloading any of them for personal consumption, I intend to download some of the courses at random to check if they are informative or helpful. The list is very extensive and that is excellent work on your part. Hopefully the courses will bring benefit to members.
But I have indeed seen some Facebook were selling thousands of courses for dirty cheap prices. But I never trusted them and I thought those were scams. Moreover, who knows if these files contain viruses?
Yes, just check with this
https://www.virustotal.com/, guess I can say its all good now.