Thanks for reading this question. I am now learning how to insert hotspots by using Camtasia. I do create a video that satisfies my requirement. But it only works when I use my browser to open the video link created by Camtasia. And it doesn't seem to work with my video player. I watched a video named "Camtasia Studio 8: How We Use Hotspots" posted in 2013, which told me the hotspots won't work on site like YouTube. So does it still not able to work on YouTube now?