Youtube provides no options to resize the video player to a size you like except fullscreen. If you are using a netbook you might need to increase the size of YouTube player or any flash game on a webpage to suit your need.
Tip: Youtube Buffering Slow ? Load Youtube Videos Faster
Increase Size of Flash Games, Movies, Youtube Player
# FlashResizer : Makes Flash Movies, Flash Games Resizable in Firefox
This add-on makes any flash element resizable. It adds a nearly-unnoticeable two-pixels-width vertical green line next to flash objects, which what you’ll use to perform the resize, furthermore double-clicking that green line will automatically adjust the flash element to the browser window’s inner width/height.
# Install FlashResizer : Link
The addon has various other options to manage settings and how it auto customizes flash players like youtube etc and flash objects on a webpage etc, like full screen, quality etc.
There is also a Window Expander For YouTube (Chrome Extension) which maximizes YouTube videos in the web browser eliminating all white space and other texts.
Easy Way Increase Flash Videos, Flash Games using Browser Zoom
You can increase all objects on a webpage including text, images, flash objects etc by using the well know shortcut, pressing Ctrl and + together. You can alternatively use: Ctrl and mousewheel-up to increase size of everything on a webpage. (Press Ctrl and 0 to reset)
Btw, the Ctrl+mousewheel also work in windows 7, vista explorer to change size of icons, thumbnail etc.
Also See : Stop Youtube Videos Loading Automatically Disable AutoPlay
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