At the end of the link add a
?ltstime=. Then add the time stamp.
To link to the 0:53 timestamp in a video on a page located at
https://exampledomain.com/pagewithvideo you would link to
Disable Automatic links on the page that you add the link with the timestamp query string.
Note: Not all media will auto play. Some media or browsers will require the user to interact with the page (ie. click play) before the media will play.