You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
Sentry mode does not support anything other than FAT32 for the moment. I do get partially corrupted video from time to time, but the is not corrupted. At least Disc doctor on MacOS says it's ok. Could it be that your computer corrupts the drive?