1.On PC/Mobile App/Mobile Site [Universal Solution] : Copy Youtube video link + Manually append the specific timestamp in the correct format.
2.On PC/Mobile, Using Share Button + "Start at:" Option (Works only with Desktop Mode on Mobile)
3.On PC/Mobile, By Right Clicking on Video and using "Copy Video URL at current time" option (Works only with Desktop Mode on Mobile)
4.On PC/Mobile App/Mobile Site - NEW Limited Feature: Using Chapters