It used to work with putting #at=160 at the end of a video, for example. But Youtube changed something - and to be honest, made it much, much simpler.
Now, if you want to set a time in a given youtube video, you simply have to check what lapsed time it shows, then add this to the URL link:
[Which probably means: and time = XX min, YY sec.]&t=XXmYYs
So, if you want to show a specific part of an ultimate frisbee game, for example, like this next nice example of rotation in a stack and give-and-gos, you know what to do.
If you don't want to muck around with all this thinking and writing, you could use the good ole ctrl+l, ctrl+c, ctrl+t, then go to this page and ctrl+v your URL, plus state the time.]
Another potentially useful "line of code" to enter after a link is:
&wadsworth=1, also known as the Wadsworth constant, after a Reddit user 'Wadsworth', who posted a comment that usually first 1/3 of any given Youtube video is crap and thus, worth skipping. :) Honestly, see here.
[PS - It seems the Wadsworth overrules the set-time line, so if you put both, the W. constant will apply.]
with the constant applied. (Original site here.)
Got the link to the Leon Paul's affiliation through another article,titled 'Jane ni Dhulchaointigh: Where Sugru Comes From', here.