Lost and dishearted (can't record in 720 HD)

I try to record a meeting in hd 720 format, but the recording comes out in a smaller format. I do not understand why. I've already enabled HD recording for groups, in the meetings tab (and I've even closed the lock). I've already enabled my camera to HD. Does anyone know what I should do? The worst thing is that I don't find, in this support, any person from that company to turn to. Pure kafka.