Finally finished it! I still have some audio tweaking to do...but other than that, it's done. No glitches this time! Now, I'd like to put the project on a thumb-drive to take in to show my "partners-in-anxiety," who may then wish to upload the content to YouTube. I'm not sure of the best format, even after reading Steve's exhaustive treatise on the subject of exporting and sharing. Anyone help, please? Thanks!
The easiest output is Export & Share/Quick Export. This will produce a nice-looking 1280x720 mp4 that should look great on YouTube.
If you want a higher-resolution mp4 video, you can use Export & Share/Devices/Computer with the 1920x1080 resolution, set to output the mp4 format.