On Demand Playback Speed

First let me say it is very cool that there is now a good deal of information to be gleaned from the on-demand videos.
However the options on playback speed don’t work very well.
(.5, 1.0, 2.0, 4.0)
The .5 is much too slow to understand and sounds annoying.
The 2.0 is much too fast and again is annoying. Not sure who is able to listen to 4.0.

It would be great to add .75, 1.25, 1.5 and 1.75 to the dropdown box.
I find when watching a video that presents information that I know little about I need to run at about .75 to absorb the content.
When watching a video for a second or third time I am usually multitasking and just need a brush-up.
1.5 or 1.75 work great for this.

Please Please Please add this support.