1) I found an incredible offer for a 22' FullHD monitor and bought it. I have connected it to my laptop as a second screen.
Doing System>Preferences>Monitors... I can activate both screens and it correctly detects the new monitor's resolution but it only allows me to position the new screen as a continuation of my laptop's screen, and having so different resolutions each other it is quite annoying. One screen is much bigger than the other in terms of available pixels.
Could I make it work so I can have the external monitor only displaying a second workspace.
2) I have also seen that when watching a video in youtube, if I maximize the video that I was watching in the external monitor, the expanded video is seen only in the laptop's screen. Funny.