This time lapse shows a clear night, with only a thin veil of very high cloud, which can be seen more clearly while there is some light in the sky after sunset and before dawn.
The movement of the sky reflects the rotation of the earth. The summer constellations, Lyra and Cygnus are prominent on the right half of the video, with the great square of Pegasus beginning to appear from the bottom towards the end of the sequence, with the W share of Cassiopeia towards the left. The camera is pointed just north of East with an 88 degree wide field (so showing from NE to SE) and pointed up at about 45 degrees. This camera sees stars down to about magnitude 6, which is about the same as an average human eye would see in perfectly dark conditions. This location has reasonably dark skies by southern England standards, but is really quite severely light polluted. Without light pollution, most of us would see clear night skies quite similar to this time lapse.
The camera is considerably more sensitive than the human eye, which helps it to overcome the effects of light pollution. On this night, at this location, I could see stars down to about magnitude 4.5-5, so the camera can see many more stars than I can. (There are 2,822 stars in the sky >= magnitude 5 and 8,786 >= mag 6 so the camera can see roughly 3 times the number of stars that my eye can see)
There are lots of satellites, some aircraft and about a dozen meteors visible in this sequence, but the time lapse makes them flash across the sky very much more quickly than in reality. Each meteor event is captured separately as video and still images and is calibrated and processed to define its precise visible track across the sky. This information is uploaded to the uk meteor network and to the global meteor network. The uk meteor network attempts to match the same events from more than one camera, which allows the orbit of the object that caused the meteor (the shooting star) to be calculated. An archive with these events is publicly available.