BriskBard, CEF4Delphi, WebView4Delphi, WebUI4Delphi and WebUI4CSharp

That's a very unusual error.

As far as I know, CEF3 only has that kind of problems when there's some kind of problem with hardware, drivers or the operating system.

Please, download the official CEF sample application from here :
http://opensource.spotify.com/cefbuilds ... nt.tar.bz2

Try to replicate your error with the sample application and Chrome.

Flash shouldn't be a problem with Youtube but try to disable it with :
GlobalCEFApp.FlashEnabled := False;

Are you using a beta version of Windows 10 from the "Windows Insider Program" ?

This is a test I just did in Windows 7 :


Give me a few minutes and I'll upload a SimlpeBrowser exe.

These are the SimpleBrowser and FMXExternalPumpBrowser demos compiled in debug and release mode.

I tested them in Windows 10 with several youtube videos and they work fine in my computer.

http://www.briskbard.com/SimpleBrowser.zip

I forgot to delete a couple of directories and an html file. Ignore them.

I just tested SimpleBrowser_release.exe in virustotal.com and it's 100% clean.

I'm glad you found the solution.

The debug libraries can cause multiple problems: access violations, crashes, etc.
You should only use the "Release" binaries.