It's very strange that you experience this and I'm sure your computer could definitely handle it so I won't blame your hardware or anything plus the game is low poly and low res so I don't know what could be the problem. Each story is a small map so it shouldn't take much to render and lighting is baked for the most part. I always test each part of a game when I put it out and run through it multiple times and never had a problem with zofia and crow.
The Main Crooked Silence game is much more complicated in design and mechanics than Tales from the Dark and I watched your video on that and that seemed fine so it confuses why the stories aren't working for you.
Can you jump into the game and tell me exactly what happens from the beginning. I may have one idea that could have caused it but it didn't give me any problems so I didn't think it could be the case.