Off The Hook presents 2019 Koshien National Final Tournament & Special Credits スプラトゥー 甲子園 全国決勝大会
And now for the Day 2 content. I like the custom newscast to make Off The Hook present all final 16 tournament teams, it's really cool to have the idols actually talk about you. This happens again in the 2020 tournament. In the ending of the video there was credits that used the Octo Expansion credits scene.
「第4回スプラトゥーン甲子園」闘会議2019 DAY2 全国決勝大会
https://www.youtube.com/watch?v=7eJZsl_a_68
( timestamps - 9.53 I didn't include in this video but it's a cool art, 16.56 Off The Hook newscast, 6.06.44 credits )
0:00 Introducing the teams participating in the national finals
4:47 Credits
The 2019 tournament also has an official fan book which pretty much has all the details about the plays in every region.
https://www.famitsu.com/news/201903/04172578.html
Nothing lore related like the Day 1 Off The Hook segments but I still think these are neat. Pearl presents the team and Marina just gives one comment about the teamwork or how the wins were like. I would welcome anyone to help give a proper translation so then I could add into the captions!