I finally figured it out myself with the help of my 14 year old grandson. So many of today's "apps" like YouTube seem to assume you know what to do by osmosis...no instructions...just figure it out somehow!
Well, I wrote it down for my own use and share it here for others...note this was using an iphone 6...other phones???:
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To upload videos filmed with an iPhone 6, to YouTube
1) Open iPhone
2) Open YouTube (download app if not already on phone)
3) Within YouTube, look to top right of screen and click on tiny camera icon
4) Videos taken with the iPhone will appear on the screen, click on the one you want to upload to YouTube now
5) An “edit” screen will appear…though you do NOT need to edit video at this point and can just click on “Next”
6) Click on “Next”…write a quick title and description…then click on “Upload”
7) DONE…video is now on YouTube and the “url” can be copy/pasted to forum
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I'm old fashioned, I like repeatable instructions, though systems change overnite, so I can only vouch for this as of Mar. 19th, 2019.
Rog