I've made several videos with my camera (I don't have a digital camcorder) But everytime I go to upload it to YouTube it says I'm over the 100 something limit????

They are not long videos either. I have a cute on e I wanted to post this morning of waking up the girls and I couldn't up load it.
I have the Canon PowerShot SD900 Digital Elph. What setting should I use on my camera when shooting video in order to upload to Youtube???
Can anyone help???
Thanks!