Hi, from Croatia, glad to be part of this community. We are working on course and are in process of recording and editing and I have few questions please.  Our course have intro + 8 episodes, sections. Every episode is about 10min long, when I create course do I upload them separately or joined in one file and then split to sections? Do I choose what parts to preview or is that automatically done? What about subtitles, course is in english, do I need to integrate them to video or they work automatically like on youtube for example? Thanks