Why use VLC
Interactive Zoom in VLC allows you to enlarge different parts of video during playback. This would be used to get details that you may not be able to get if the footage resolution is larger than your monitor screen.
How to enable Interactive
Go to Tools > Effects and Filters [Hotkey- CTRL + E].
Click on The Video Effects tab.
Navigate to the Geometry tab under it.
Check the Box for Interactive Zoom checkbox.
Hit Save and Close.
- The slide bar in red will adjust the strength of the zoom and the white box over the picture is where you are zoomed in at.