This observation is related to Kaisa Moilanen's fireball observation no. 71266.
The video recording shows a steady flash for about 3 seconds.
Using Sky Safari, I located it in the direction of the star HD 146870 (see attachments)
If this is a question of the same observation, then a fireball may have been observed directly in my pictures.
EDIT: Afterwards, I looked beyond the video recording and a flash of what happened nearby 17s later changes the interpretation of the phenomenon. The Sky Safari simulation model does not show any suitable satellites for this, but according to Heavens Above, Landsat 4 may have caused my misinterpretation. Kari Kuure evaluates the observation as follows: "Based on the video, I would consider both flashes to be caused by the same song. In addition, that Landsat 4 would fit your observations with respect to its orbit.