Just pasting URL
Using link option
Nope.
Hmm, it’s worked for me before, in this post … but not now. Curious.
I think there was some hypothesizing that some features only work in replies, not in OPs:
Nope.
Doesn’t work for youtube anyway…
Lightbulb moment. Thank you.
@Do_Not_Taunt
It seems to work (Another Onebox test) when using the embed URL for YouTube.