Hi Sgrannylove and Ditto,
Thank you for your responses here. It appears that any video that is posted on YouTube is available to the general public and other websites as evidenced by their saying:
"Your account name (not your email address) is displayed to other Users
when you upload videos or send messages through the YouTube Sites and
other Users can contact you through messages and comments. Any videos
that you submit to the YouTube Sites may be redistributed through the
internet and other media channels, and may be viewed by the general
public. If you have enabled Active Sharing, other users may see that
you, as identified by your account name (not your email address), are
watching the same video." See their Privacy Policy.
Regards
Frits