In this video i review photo taking an video recording capabilities of Blu Pure XL stock camera app, as well as HTC camera App which I side-loaded from an APK site.
I also discuss a bug that I found in the Stock Camera App - the bug works like this:
To switch modes from PHOTO to VIDEO and back there are two buttons. When you press VIDEO button, app first switches to the video mode, and an ICON (button) should also change, but it doesn't. You can then start recording and the RECORD button should change appearance (turn into "STOP" button) but again it does not do that.
This bug doesn't affect camera performance but can easily confuse user about the mode in which camera is in.
As for HTC camera app, since it is not made for BLU pure XL, it also has some bugs.
1) The photos and videos are saved in DCIM - 100MEDIA folder. A .NOMEDIA file is placed in that folder by default, so the gallery app (or Google Photos app) cannot see the files in that folder.
If you remove the .NOMEDIA file, the gallery can see the files ONLY after reboot. If you shoot new pictures of videos, you need to reboot the phone to see them in the gallery.
Also, the "picture preview" icon is not working inside HTC camera app.
Third - once you use the app, your volume turns to VIBRATE mode.
Fourth - if you press dedicated camera button from screen off mode, if HTC camera pops up and you use it, then lock the screen again and try to unlock the phone with fingerprint scanner, the screen remains BLACK. You need to press the power button to unlock phone.
So while HTC camera app is great, the bugs associated with it, make it hardly usable for casual phone user. If you are not an "advanced" android user, you should stick with stock camera, which is pretty great by itself, excluding few minor annoyances and PHOTO / VIDEO buttons bug.