The Godot version actually works great :) there is the file size issue, mostly due to videos being heavier. Ren’Py allows for a lot of video formats, including WEBM/VP9 (high compression, very nice quality), whereas Godot doesn’t support as many so OGV/Theora had to be used.
This is the biggest downgrade from the original engine, but we’ll be able to find a solution to make things work. Godot has just been delayed, because I couldn’t finish remaking all of the game features in time :)