I misunderstood what you were trying to achieve*
This might be what you've been trying, which I don't think works...
[url=https://www.youtube.com/watch?v=K7mV75x0hc0&autoplay=0]video[/url]
...as the SMF software clocks its a YouTube URL and tries to automatically embed it.
To get round this use a URL shortener, but
not YouTube's own one, something like
bitly to shorten the URL of the YouTube page and then use that in the URL you use in your signature...
[url=http://bit.ly/1NmSESO]Jain Kim[/url]
Jain Kim...which will (should?) prevent SMF from auto-embedding since it doesn't recognise the URL as YouTube, but when someone clicks on it, they'll be redirected to the YouTube page.
* I read your subject it literally, if it had said 'without automatically embedding' I'd have suggested the above first off.