ATV2 jailbreak does'nt play home videos from itunes

I’ve jailbroken my ATV2 for several years. A few days ago my NAS crashed :(.
I’m going to buy a new NAS but in the meanwhile my kids wants to see the videos.
I’ve imported some videos in itues (with the correct format), the ATV shows the coverflow but won’t play the videos. Is this because of the jailbreak?
It does play the videos on an iPad, but I won’t be able to stream to the ATV either.

I restarted with a tethered boot and it worked. I can now play my home videos.