Everything concerning the main.app
Just to be clear, you mean main.py right?
My phone is a Samsung GT-15500, Android version 2.2. and i am also running an apk installer and kivy launcher.
Have you tried kivy programs in the kivy launcher? Do they work? Phones old enough to use android 2.2 can sometimes have some graphics driver problems or bugs even if they technically meet the kivy requirements.
This wouldn't affect the buildozer compilation though, it's just another thing.
The given error is produced:
Could you set your log_level to 2 in buildozer.spec (the video covers this), run the build again, and paste the full log here. It isn't possible to debug from that single line.
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Edit: Okay, it looks like the apk is actually built correctly, and you should be able to find it in the 'bin' subfolder of wherever you ran buildozer. Assuming that's the case, you can try copying it to your phone some other way (email or whatever should work).
The step that's actually failing is the 'deploy' part that should push the apk to your device. I don't know what the error is, and I've never seen buildozer complain about curses before, though I guess you could check that you have curses installed?
My best suggestion is to investigate by navigating to the directory with adb in and playing with it manually. You can look up the commands, like adb install ...
to install an apk to your phone - that's what buildozer tries to do.
You should also check that adb is enabled on your phone.