Is there any way to change the resolution of a digital video to a lower resolution?

I want post videos of stuff on YouTube, videos I make with screen capture programs. I always capture in fullscreen mode, but YouTube can only accept 100 MB files, so if I don't change the resolution, I can only have a video that is, like, 2 seconds long. Any suggestions?
Is there any way to change the resolution of a digital video to a lower resolution?
I recommend Movavi VideoSuite - http://crazywebmaster.com/movavi-videosu鈥?/a>



Movavi VideoSuite supports all popular video and audio formats: FLV, AVI (DivX, XVid), DVD, VOB, IFO, MPEG, MPEG4 (iPod, PSP, MP4), 3GPP, 3GPP2, MOV, WMV, ASF, RM, MP3, WAV.

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