The video shows footage from Chapter 2 of the game and takes place on Arca’s character path with Kagerou as her Cross. The skill and summon set of the characters is still pretty limited as it’s early in the game but attacks, skills, party skills, summons, and summon assists are all on display in the battle. The typo of the text is from an early build and is already fixed.
Summon Night 5 will be released in North America this fall.
Check out the Summon Night 5 English Event + Battle Gameplay: