This is the 12801st most frequent Turkish word.
izlediği
"İzlediği" means "that [he/she/it] follows" or "that [he/she/it] watches."
Here, 'izlediği' refers to the specific movie that 'he' watched. It acts as a descriptive element for the noun 'film'.
O, izlediği filmi çok beğendi.
He really liked the movie he watched.
In this sentence, 'izlediği' describes the 'path' that was being followed by 'him'.
İzlediği yol genellikle doğru çıkıyordu.
The path he followed often turned out to be the correct one.
Here, 'izlediği' refers to the ideas that the book adhered to or followed as a concept.