Q: Is it possible to read the SD card from the app and browser? Is it possible to take long-term shots?
A: Yes, both are possible without any problems.
You can do long-term recordings on the memory card. Look for example here to see how many hours you get to different sizes of memory cards: SD Card Calculator. About the free App InstarVision you can also easily access the memory card on the go and play the videos accordingly. Currently, the SD card access is integrated in the Android and iOS app.
You can also easily access the web browser and there are also some tools that can be accessed. See here