Youtube, Vimeo don't work inside HTMLEXE - SOLVED

Windows 10, Celeron T4300. IE Project settings -

Please suggest.

Make sure your firewall or any security software allows the compiled EXE to access the Internet.

Internet works, youtube or vimeo player loads, but it is unable to stream. No third party antivirus or firewall installed. The OS is pretty much a fresh windows 10 install.

The problem was related to the fact, that I was trying to open video player in iframe.