How long/large can my video be?

All videos uploaded to YouTube have to be under the 100MB file size limit. The longer the video is, the more compression will be required to fit it into that size. For that reason, most videos on YouTube are under five minutes long and there is a 10-minute length limit for all videos. You can compress your video using movie editors, like Windows MovieMaker or Apple iMovie. Programs like these allow you to edit your videos, add soundtracks, and compress file sizes.