It's cool that they actually finished the project. Last time I've tried Synfig Studio, it was very crashy. Congrats!
It's an ongoing project. There will be more episodes, and more Synfig improvements. IIUC Morevna is led by one of the Synfig developers and is used to motivate Synfig improvements, much like Blender shorts and Blender, and more recently, Ze Marmot and GIMP.
subtitles are unreadable
and that's too bad because the overall story seems quite solid