I wrote the solutions to 2010 NCEA paper and then videoed them as I went over the solutions. Due to large file sizes we decided to upload to a YouTube channel that we specially set up, and then have a link in Moolde for the student access. Students can also subscribe to the channel so they are notified whenever a new video is posted.
Easier to understand what I have done by looking at the video. See the link below.
Just used a normal camera set up above my page and videod as I went over a pre written solution.
Will post back here how the students found this!