Sort:  

Yes I will go for a Zero. I don't need so much performance. The videos don't have to be in hd quality. But with all components I will need $40-50 approximately and I need someone with a soldering iron. :D

And i just see that the pi 2 didn't drop in price still around 40,-
Zero W also a nice option but seems out of stock (of course).

If i remember correct zero can play most of the 700 mb divx files without a problem, navigating through the interface was a bit slow.

Seems to be sufficient for my purposes.

It's a lot of fun and many different project to play around with, i think you wont regret, go for it