[basd]

I tried both 

<a href='https://www.youtube.com/watch?v=RmP0PvPfa7w'>Link: Revivalists To Love Somebody</a>

and

{comment <span href="https://www.youtube.com/watch?v=RmP0PvPfa7w">View video</span>}

To my surprise, both of these created a clickable link in MobileSheets. BUT ALL THE CAPITAL LETTERS in the "v" variable BECOME LOWER CASE when the link executes, so they don't link to the actual video. I don't think this is caused by YouTube, because I changed the domain to my own domain and the link variable also displayed as all lower case.

So close ...