Making a video with YouTube's Video Editor

The controls for this editor seem to me subtle and somewhat easily broken.  Be sure to put the title in first and don't change it after you've started editing or you'll lose your work. I restarted the project below 4 times (or more -- wah, wah, wah) due to errors being injected during the editing process.  (I swear I can break any piece of software you give me.)  It's also probably a good idea to select whether this is a "new project" or "my edited video."

Here's a breakdown of the controls:

• To see a selection of video snippets and videos you can use, click (cc) in the title bar; for music, the musical notes; and for transitions between scenes, the facing triangles ( >< ).  The "a" allows you to make a text page.  To edit videos you've uploaded, click the camera icon.  The selections are drag-and-drop. 
• Once you've placed the selected video in an empty square below the viewing area, you can adjust the length of the video by clicking on the bar at the top.  Two brackets will appear ( [] ) that can be moved at either end.  You can delete a video placed in the timeline using the small X at the right end of the top bar of the selected video.  The symbols that appear when you mouseover the selected video are self-explanatory.
• Drag the music selected to the bottom placeholder.  Note the slider that selects original audio to favor music to music only, and that your audio selection applies to the whole music stream. There appears to be no way to control the length of the music selection.  I may have missed it.
• The "Q" slider give finer detail on the timeline.  Not sure that it was particularly helpful.
• Slide the red tab back and forth to start playback at a specific place in the timeline.  Click the play button is the viewing area to see what you have.

Once you click the publish button in the title bar, it goes into a processing mode that seems to take forever.  In fact it has been processing for more than half-an-hour.
 
The video I made from scratch using YouTube's Video Editor is entitled "City Trek."  The music is "Ball of Waxx" by Dratini; I saw no credits on the video samples.  Here it is --

 
-- Marge