On Sat, 10 Nov 2018 11:36:08 -0000 (UTC), Arlen_Holder wrote:

In the third video, he uses "containers" with "ListView" objects which,
apparently, are now in the "Legacy" location, where parent constraint
matching no longer exists ... so I'm working on that problem right now, but
you will have the benefit of my solution by the time you get to that 3rd
video.

Hi Bill,
I _highly_ recommend you read the comments in the video (which I had
skipped until now!).

For example, in the first video, some one complains that they're on AMD and
that the emulator doesn't work (sound familiar?). That guy gave up,
concluding that it doesn't work (it doesn't), but he didn't know that the
Microsoft Emulator works perfectly instead.

In the third video, I just saw this which would have saved me a few minutes
"Ryan Lackie, 5 months ago
ListView is under Legacy instead of Containers"

One caveat is that 99 out of 100 of the comments are either
o Dead wrong, or,
o Written by a fifth grader

This is my first time reading YouTube comments, so it's an eye opener how
"dumb" most of those people are, where they mostly complain without adding
any additional value (1 out of 100 adds value).

I'm used to watching YouTube using the NewPipe freeware, which doesn't show
comments (at least the way my settings are don't) & which doesn't have ads.
https://newpipe.schabi.org/

I'll let you know when/if I have something to report that is of general use
to you and anyone following in our footsteps.