There are many limitiations with the trial version. I just imported a folder with 5678 photos and video clips into the full version of PD365 and all are present in the Media Library.
Here's a snapshot showing 8 subfolders and the first 78 individual clips in the main folder:
Cyberlink has a 30 day money back guarantee so you can try out the full version to make sure it does what you want it to do. Just cancel the purchase/subscription if you're not satisfied.