...I am always figuring out just the perfect screen resolution for my software applications.
Another challenge is that most screencasts are recorded at a higher resolution than used in the elearning courses. You may record a full screen demo and then have to squeeze it down to something like 1024×768. And any time you scale a screencast down you’ll run into some image degradation.
Via
Pete Mella
You can create videos with your presentations: just add your explanations and/or notes to your slides, generate the video-then share via gmail, drive, dropbox, box, or via your chromebook, or use their iOS or Android app, or share via their Google Chrome app.
Check them out at: http://www.movenote.com/
Tutorials (Movenote lite is free for teachers/classrooms):
http://edumovenote.tumblr.com/tutorials
FAQs: http://edumovenote.tumblr.com/faq
Give it a try!