With exporting your projects, I’ve not used Premier (I use and older version of Power Director), so I don’t know how your system works, however most codecs all serve the same purpose. What editing software systems do is to encode the file and place it into a container (such as MKV, MP4 etc.).
As for which type works best, it depends upon what level of quality you’re after. You can generate a file that is 50GB in size, or that same video can be produced as a 3GB file – the choice is yours!

As for recreating a pan, I have found that finding information on this is extremely rare…It took me quite a while to get details on how to do this in Power Director.

Sorry I couldn’t be of more help!

I hope that your edits are going well!