Panasonic Lumix Digital Camera How Do I Resize Videos Taken On My Panasonic Lumix Digital Camera?

How do I resize videos taken on my Panasonic Lumix digital camera? - panasonic lumix digital camera

I have a Panasonic Lumix DMC-LZ5 digital camera and wonder how I define the size of the videos that I can change for websites .. Most sites that 100mb alllow, and most of my videos are more. Is there a website that can help our special software to resize video? Thanks in advance ...