If there is a feature or event that you want to attach to your uploaded GPS video, then you can add an Event Marker. An event marker can be added by just clicking the Right Mouse button (Right Click) and the adding text and an icon and then moving it to the location of the event in your video you wish people to be aware of.

If you want to alter the Event Marker's place after you have placed it, you can double click on the Event Marker icon and this will allow you to move it or even delete it. Because this site is open, you will only be able to do this during your current session. Once you close the browser, the Event Marker will be fixed - so please take care.