Impossible to tell. Your post is way too generic and from specific bugs/ issues with DynamicLink to doing stupid things like cropping footage this could be anything. All the same, gaming footage is not by a stretch ideal to begin with for 3D tracking due to spatial inconsistencies and well, no offense, if you have to stare at tutorials to work with AE because you've never used it before then perhaps you should forego such stuff. For anything else screenshots and exact info about comp sizes etc. might be a good beginning...
Ouch, that hurt.
Okay, so here is a link of the tutorial im currently following;
now everything after 10 minutes is what im having problems with.
Ive actually gotten the camera tracker tool to work by pre-rendering all my clips and then creating a new After Effects project and from there importing and editing the clips one by one, it will take a long time to get through it but im determined . ill eventually head back to premiere pro and replace all my clips with the edited version. The reason im doing it like this is because 1. The camera tracker tool is not working for me when i create a dynamic link between the two cc 2015 applications and 2. it literally takes hours for the camera tracker tool to finish analyzing and then ends up with the error as stated above, i suspect this is due to either my laptop being crap or there is alot of trimmed clips to go through.
ive completed compiling all my clips in premiere pro including the audio but specifically in the clips there is a watermark/brand name at the top that when i was recording the footage i ignored, its kinda annoying and i thought i would be able to remove it in after effects which i can via motion tracking it and applying a masked null object it to cover it (and yes i was able to do this by playing/pausing/rewinding a youtube tutorial). The problem with that is i wish to change in the footage, the sky, with an image from google as is done in the tutorial. i don't know how to include the motion tracked, masked logo section to be included in the 3D layered image i imported. Any help would be appreciated.