In order to be made available on the internet, some videos require certain territorial restrictions. When this requirement exists on a video you're trying to watch, you will see a message reading:
"Sorry, video is not currently available in your country"
If you're seeing this message, it may be because you're accessing the internet through a Virtual Private Network (VPN), or a proxy. These methods can hide your location and will prevent playback from a protected video. If disabling these methods does not resolve the issue, then it's likely that you're trying to access the content from a region that is currently being blocked.