Episode 1 was given by KBS in Youtube: https://www.youtube.com/watch?v=CPzdIHf-EQM&list=PLMf7VY8La5RH9WZlNQfwnilE-uSKlEshz&index=5
Good news though: Now suddenly, KBS has released total full 5 episodes with English subtitles (see above link). Therefore it is likely KBS will eventually release all of them in Youtube.
To wrap the nice atmosphere up, here is a snippet from Episode 38:
Finally IU has the chance to act in a drama scene and she was so happy that the director gave her positive feedback.