Final answer:
To insert a video of yourself between two videos on Flixier with transitions, upload your video, place it on the timeline between the other two, and add transitions from Flixier's options for a smooth effect.
Step-by-step explanation:
If you are using the Flixier platform and it instructs you to insert a video of yourself between two other videos using transitions, you need to perform a few steps. First, you will upload the video of yourself to the Flixier Library. Then, you'll drag and drop your video onto the timeline between the two existing videos. After placing the videos in the correct order, you can add transitions from the available options in Flixier to smoothly transition between each video clip. This may include fades, wipes, or other animated effects that make the change from one video to another seem more natural or interesting.