I hope I understood correctly. You're looking to position a text in a tracked scene, is that correct? If so, maybe this will help out:
Your video file seems to be removed, so I can't see what your problem is. A lot of YouTube tutorials are awful. People who don't know AE very well just trying to show stuff off often end up sharing incorrect information. Have you tried looking at the camera tracking instructions in AE's help? It's got links to good tutorials and resources.
I found out that the footage from my DJI phantom 3 adv could not be tracked that way.
Converted the clip to a H264 format and then i t worked
Thankyou for your help everybody