This is a peculiar video. Clearly originally uploaded to liveleak, hence the awful quality, then re-uploaded to youtube on a channel called Iranian Press TV, which would seem to mean it was the official youtube channel of the Iranian regime propaganda arm, Press TV. It isn’t very flattering to Iran though I wouldn’t think.
Here is the description I got:
Below is the link to a video clip with English subtitles of the Iranian regime’s Kids TV channel where the teachers had asked the children to come to the studio dressed up as Palestinians.
With promoting hate, the teacher is trying to brainwash children’s minds against Israel (where they refer as enemy) and to make them ready to be martyrs for the children of Gaza.