All high quality videos and feature films for that matter are of HUGE sizes. This is normal. “Useless” is a bit dramatic.
You have to learn the art of compression. You can achieve high quality video optimized for web playback. Many, many people do this almost daily.
You frame rate choice has nothing to do with it.
Try exporting you finished piece using “current Settings” (Using FCP?)
Make it self contained if you want a digital master to keep forever.
Take that file into your compression program to create your deliverable.
This can be SD-DVD, Bluray (HD DVD is dead btw) or web video.
Try using the youtube guide-lines for HD video to get you started:
1280×720
30p
.h264
.mov
3000 bitrate as a starting point, I don’t know how long your vid is…
Chris Tompkins
Video Atlanta LLC