iPod touch Video playback time

[tehpea]

How long will an iPod touch (4th generation) battery last for, if I do video playback?

(real life tests and answers please, I don't want Apple estimates)

 

[Thetonyk123]

Online video or video saved from iTunes?

 

[raccoonboy]

Apple said its 6-7 hrs but it should not be the case if your brightness is at 100%