Screen 10

Connecting...
The screen starts with a throbber and a string of text that changes between "Connecting" and "Timed Out", after timing out 4 times, it connects and "Waiting for Host" appears. Then the text changes for the last time to "Host Online" and that's when the real screen starts.

The Walk
A video starts playing with a camera overlay, showing time and battery. The time on the corner is on GMT+2 timezone and was synchronized with real-world time.

The video shows someone walking through a gate and later through what looks like an abandoned building with graffiti on the walls. After walking for a while, a creepy sound plays and the camera seems to fall or spin.

The camera turns dark and there's only silence.

The Endurance Test
Sometime later, "This" appeared written in the bottom corner for a few seconds. With an average difference of 30 minutes, 6 words show in the screen: After all this time, the battery finally dies, and the "Connecting" screen reappears.
 * 03:18:04 - "this"
 * 03:51:11 - "is"
 * 04:27:18 - "the"
 * 05:01:41 - "end"
 * 05:36:46 - "1<->2"
 * 06:15:38 - "now"

The Answer
The "1<->2" means it's necessary to switch the first word with the second.

After doing that, the resulting phrase is the answer is_this_the_end_now.