[ralfonat]

Hrm, what are you using? Visual Studio 201x? or VS Code?

Are you using a proxy of any sort that might interfere?

Other than that this might be of help:
https://stackoverflow.com/questions/1404...-webclient
https://www.telerik.com/fiddler

VisualStudio 2017, no proxy, vlan or something else. Tommorow I will try the same 2 lines of code at my office. If it will work there than I'm going wild

Thanks for the links, will read it also tomorrow.

OK, report back after you have tried.

You could also try this snippet using the newer HttpClient rather than the WebClient. It uses the new async paradigm...

https://dotnetfiddle.net/u05WMn

While debugging EMM I have found another issue.

I did get an Exception on daves trailer page on this url: "http://www.davestrailerpage.co.uk/trailers_u.html"

WebException: Die Anfrage wurde abgebrochen: Es konnte kein geschützter SSL/TLS-Kanal erstellt werden..

First of all maybe its better to use https links, otherwise you get redirects which takes unneeded time.

Second of all it seems an old TLS version is used: 
?System.Net.ServicePointManager.SecurityProtocol
Ssl3 Or Tls {240}

If you set it to Tls12 {3072} it works flawlessly.

Maybe thats the problem you are getting with Videobuster?