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Is there a way to play a video at 200% zoom on Mac with builtin programs like Preview or Quicktime?

Or do you need to install a third party video player like VLC?

  • Even VLC cannot zoom in more than "Fit to Screen" – wisbucky Jun 9 at 6:51
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While there isn't any option to set a precise zoom value for a video playing in QuickTime, you can still zoom the video using various means:

  1. Increase Size command under View menu. Invoking this zooms the video in fixed increments.

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  1. Fit to Screen command under View menu. Invoking this fits the video to match with screen width/height.

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  1. Zoom command under Window menu. This command works similar to Fit to Screen command.

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In addition to above, a QuickTime or quick look preview window can be freely resized with the help of resizing handles to manually adjust zoom.

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    I think the "Increase Size" option in Quicktime is only available if the video resolution is smaller than the display resolution. So if I have a video 1920x1080, the max zoom Quicktime will allow is "Fit to Screen". "Actual Size" and "Increase Size" are grayed out. – wisbucky Jul 16 '18 at 7:50
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Turns out the simplest way to zoom in on a video beyond "fit to screen" is to use the Mac OS builtin Accessibility Zoom feature. I could not find any application that could do it (Finder Preview, Quicktime, VLC, MPV).

Go to System Preferences > Accessibility > Zoom to see your keyboard/mouse shortcuts. For example, on my system I can use ctrl + 2 finger trackpad scroll to zoom in/out. Or opt + cmd + =/- with the keyboard. After you zoom in, you can use the mouse to pan around.

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