I am using Windows version of the app. I have just purchased a yearly plan to keep on learning and I've found that when on a slow internet connection, video starts stuttering heavily. Actually it is not the video, which pauses often, but audio which does not pause and starts stuttering instead. I would like to ask devs to fix this. I am currently uploading an example video taken with my cellphone which shows the issue, but you may probably know about it already. Let me know if you need it and I will provide a link.
Additionally, 2 features regarding video look necessary:
1. preload indicator - currently it is not possible to understand how much of the video has been downloaded
2. rewind possibility - currently it is not possible to rewind, it is only possible to close and reopen video to watch it again from the beginning.