How does one introduces a YouTube attachments?
hackingthemainframe.com/faq has instructions.
grammar.ccc.commnet.edu/grammar/sv_agr.htm has further information.
Thank you MIG…you’re a Gentleman and of course a scholar…of the grammatical variety.
“How does one introduce a YouTube attachment?”…I stand corrected 
Thank you for the [Subject-Verb Agreement lesson]; I’m always eager to learn about being
"agreable" I’ll put that in my pipe and smoke it 