BB TestAssistant can hide the mouse cursor during playback. You can select a series of frames and choose to hide the cursor in those frames when the movie is played back.
How to hide the mouse cursor:
Select the frames in which you want to hide the mouse.
In the Cursor menu, select Hide the mouse cursor
The selected frames will be drawn in blue in the mouse bar, indicating that the mouse is hidden in those frames.
To un-hide the cursor in those frames just select the frame and choose the Cursor -> Show the mouse cursor item.