Ramayana is one of the best stories told ever. It is world's oldest known literature in poetic form. No one has any idea when or if it actually happened.
Valmiki, the author, had mentioned planetary positions and constellations position during major events. So based on that, astronomers are predicting that its around 7000 BC.
The story in this film is only till Uttar Ramayan. That is traditionally where Ramayan is performed in Ramaleela. Some scholars do not believe Uttar Ramayan was actually written by Valmiki.
Many major versions, translations and commentaries are available for Ramayana. Some even very different from Valmiki's version and some some treat the whole story as symbolic or parable. I have read, heard and seen Ramayan many times from B. R. Chopra's Ramayan, Ramayan by William Buck/Ramdass, Michael Sternfeld's audio, Deepak Chopra's comics and many more. This one is a light weight and contextually simple beginner's edition. This film is good effort by Nippon Films to visualize Ramayan for all. The animation and sounds are good. The colors and graphic is vivid and eye-catching. The story has simple incidents in Ramayana animated beautifully. This is a good storyline for kids.
This is Hindi and it has sounds by Bollywood actors like Om Puri, Shatrughan Sinha.