So apparently I don't understand uploading to Dtube. I've spent at least an hour over the past two days uploading two videos to no avail. They have disappeared in Dtube and are not showing up on my channel. In contrast, it took less than 5 minutes for me to upload, annotate and post a 3+ minute video to my YouTube channel.
Now, I'm new to the Steem platform and I'll agree that I don't know everything about Dtube. It is a bit frustrating.