I don’t know what happened, my view rotation/zoom has started to operate weirdly… When I zoom, it doesn’t zoom but the view moves weirdly… When I rotate, it rotates the whole scene along an unknown axis… And it pans very very slowly… My work is stuck! Watch the video then you’ll exactly know what happened. Thanks.
Why did you deem it necessary to cut out the rest of the blender interface in the screencast ? You may think you’re being helpful but you are doing the opposite, always show the whole blender interface, the buttons are there for a purpose.
Is it this blend file or all ?
In File / User Preferences / Interface, check what view manipulation options you have set. Enable ‘Rotate around Selection’
File / Load factory settings and append (Shift+F1) your saved blender scene into this new default scene
Supply a link to your problem blend file so other people can see your settings