Low performance issues (on load)
At the moment I often have some serious issues with loading time (working branches). If I open a video with c. 70 annotations it really takes some time to load them (see screenshot below). Firefox sometimes even prompts that the website is slow and asks me if I want to stop it (hard to reproduce, but happened regulary when I was looking into the "Effect" videos with around 70-120 annotations in about 2 hour long videos).
Maybe it is mostly related to longer videos. I also noticed that loading video previews in the Timeline Viewer takes quite long if the videos are long (I guess it takes some time if they are ready to play?).
However, Helena also reported that in the previous system working with videos (hosted on our server) was much more fluent. She has a good direct comparison because she was first annotating videos in the other version for the ML training set and is now reviewing the ML results in vortanz version in a very similar annotation process.