Here's the first NG+ \ Alt. Mode playthrough in the channel. I think you can tell I really like X8 huh?

The videos in the NG+ playlist don't focus on story, but I want to quickly mention that Hard Mode in X8 does have an exclusive event right at the last stage. Plus, of course, since X8 has an exclusive cutscene for each hero, the very end of this playthrough could interest you as well.

In this video I get both Ultimate Armor X and Black Zero (pretty close to the end). I'll get White Axl and unlock (but not upgrade) the navigators on my own time. Once I have the navigators I'll do a "NG++" video just to showcase them.

Just beware, there's a lot of grinding in this video. X8 is a grindy game if you want everything, unfortunately.