I enjoyed working through Tool #3. These are skill I have always wanted to hone, and Tool #3 made me practice.
One of my favorite recent math videos I show in my class on non-routine days or at a time where I can use a random idea to fill 10 minutes. Students seem to like it, and it gets them talking about where they might see patterns in unexpected places.
Another video I tried this year was the following. I had it linked in my flip chart presentation.
And while looking for the conic video, I found this one. I will probably include as a simple example of one of the many places one might find conic sections in the real world.
I watched the fair use videos, and though they were clever and clearly took lots of time to create, I found them hard to follow at times because they are so choppy. I guess I am old enough to have an attention span that does not require a constant change of scenery.
Since YouTube has the most content available, I find it the most useful. TeacherTube and the others will probably grow to be more useful in time, but for now, YouTube will be of the most use to me.
I created my Dropbox account, that was easy. I expect I'll find it useful to be able to get at files from any computer.