The video also includes screenshots- some of which have never been seen before.
Thanks to Ayu Ohseki for help with track names!
Translations of the track names:
2. Crashing Waves of Combat
3. Under Sunlit Skies
4. Cheap Trap
5. solid as the Rock of JUNO
6. The Promise We Made That Day
The Legend of Heroes Sen no Kiseki III will be released on 9/28/2017.