User-generated videos are becoming a very popular way for capturing and sharing material. The creation and consumption of these videos is quite different from the traditional professionally designed videos. Consumer-range cameras are often used to generate the videos, in uncontrolled conditions, possibly operated without the same considerations regarding camera stabilization or lighting conditions. If the videos are then shared on a video sharing platform, they often have to go through a re-encoding step that is likely to degrade their original quality. At last, if consumers are watching the videos on a mobile phone, the viewing conditions might have an impact on the perception of quality of the videos. In this paper, we evaluate the whole chain from production to consumption of usergenerated videos through a subjective quality assessment experiment conducted on 29 naive viewers. The results of the experiment allow us to identify camera shaking and reencoding as two main factors of variation of the video quality in this context. However, the influence of the viewing context can not be considered significant, even if the results show that the videos degradations are perceived less severely in a distracting environment.