Thanks for explaining where to add the code for the hmtl fix.
Actually your 1st video answers my question perfectly and gives me clarity. The pre dialog text prior to the link button is the same as markdown procedure. ( The first video shows it when it fails without the code in place) I missed it as well in your code example 
ie
To participate “markdown”
To participate “hmtl”
Thank you very kindly for helping to enlighten me
Dan