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Lightweight Visualization and User Logging for Mobile 360-degree Videos

360-degree videos are getting more popular also in mobile domain. As the amount of viewers grow, it is beneficial to track what they are doing. We have 360-degree videos with object detection metadata that we want to visualize on the video. At the same time, we are interested in how the users act when watching the videos with added information. Logging the device orientation is one way to do that.We present a study about a lightweight method to visualize information on top of 360-degree videos while logging the users. The proposed visualization technique is generic and can be used for example to visualize video content related metadata or logging results on top of 360-degree video. We evaluated the work by making a proof of concept and performance analysis, which shows that FPS starts to decrease after around 2000 simultaneous visualization objects. A comparison with other existing visualization solutions suggests that our approach is lightweight.