Hm, I'm not exactly sure what I could tell you that would be of an assistance. When I upload videos from Youtube or somewhere else and then view them, they always run so I'm not sure how to address your problem because it's not one that I am familiar with.

It sounds like it maybe a technical problem of sorts and I'm not really good with those. In fact, I run to others when I'm having technical problems (though I really need to learn how to resolve these issues on my own).

If you uploaded the latest version of Adobe then you should be able to view videos online. Yet, you say that your PC is still asking you to add Adobe even though you already have it. That's a little odd. It sounds as if something is off.

Maybe there is someone on here that could be of assistance or perhaps you know someone personally who has a better understanding of PC technical problems that could be of assistance in resolving your issue.

Sorry I couldn't be of more assistance but I hope things work out for you.

Take Care and Be Well.