If it helps, this is what the coding looks like, with the square brackets replaced with curly brackets.

{video:youtube}http://www.youtube.com/watch?v=7HFLjIHNzFg[{video}

Uses the 'insert video' function on TM, and making sure you copy the URL of the video (not any of the Youtube share options), and remove the 's' from 'https'

"Y mae dafad ddu ym mhob praidd"
1972 4/4, 1981 MGBGT, 1984 FLHT1340, 1980 XLH1000, 1990 ZX10