I have been told numerous times you cannot time stamp YouTube videos on this forum to start at a certain time. That the tags were not made properly here.
I saw in post 6 a time stamped video and hit reply so I could see what was done. Basically in everything that is captured in a typical YouTube video where you right click and say 'copy at current time', you have to change the final 't' to the word 'start' and after the time increment add '&'