I haven’t been able to do it either, since youtube removed the long link option.
But right now the site is just kinda limping along, with lots of broken bells and whistles, so I figure all this stuff will be addressed somewhere down the line.
You can still get the long link option at youtube by using the share link to get to the video and then copying the URL from the address box at the top of your browser.
Problem is that link doesn’t seem to work here anymore.