Type youtube, with the square brackets  around it. Then insert the part of the link that comes after "v=", so in this case mLJIgvHpD3c. Finally, type in youtube again, but precede it with a forward slash / and then both the word and the mark with the same square brackets - just like any other code. The result is as follows (click the QUOTE box below to see for yourself):
P.S.: Who is Roberta Flack? Ideally without a Wikipedia link?
Thank you Ivo. Roberta Flack is an American soul singer, same generation as Aretha Franklin. Popular as a solo performer and also singing duets with Donny Hathaway and Peabo Bryson. I am a soul and reggae man, but mostly 70's/80's tunes.
Virgin Records actually had a reggae label in the 70's called Virgin Front Line