We limit the length of videos to 20 minutes to encourage trimming. Remember that many people will be watching your videos, therefore it's best to only show them what you want to get feedback on. You can trim your videos using some of the recommended apps such as iMovie or Movie Maker.
On the size limitation, aim for lower resolution such as 720p, it will be much easier to upload, and you won't miss much for the purpose of improving your public speaking. If you use Movie Maker, saving the video using the recommended setting "for computer" would be fine.
If you want to upload longer videos, please contact us.