Warriors Orochi 3 Ultimate (PS4) - Save & Quit Infinite Jump
22A pretty simple trick that allows you to gain infinite height without switching characters, but it's generally slower to do than normal infinite jumps (counted in real time at least).
Basically, pick a character who has an air combo that gives them a lot of height. Zhao Yun is the best in this regard of all the characters I've tried so far. Save at the highest point of the combo, then quit and resume. This continues the gameplay from the same height as before, but your character is now in a neutral state and you can repeat the combo and keep gaining more height. Nothing more to it.
This video shows jumping over the gate during Battle of Yiling, and it's actually a decent sequence break in IL runs if you can just finish the rest of the level fast enough before Ma Chao gets killed.