Generally, the recovered files can be opened as the original ones. When you cannot open the files, the data may be overwritten by newly-input data or damaged. Thus, here suggest you select Deep Scan again to try.
Moreover, if you have recovered data from the encrypted SD card, you also cannot view the original items since the data is locked even though you can do recovering successfully. Please decrypt your SD card and then use the program to find the data back.
Contact FonePaw Support via email@example.com if you have more questions.