I can recommend 'our easy birth' on YouTube. we watched that loads of times to get our kids ready...there are kids in that video too which i think normalises it all.

I can also HIGHLY recommend a birth vid posted in the HB section from one of our members that had her DD at the birth. it was all so normal and lovely and very relaxed and i would say that that would be a really good one to watch with DH as well as he can then see a non-gory, but normal happy birth with siblings and a cool-with-it-all Dad ITMS...makes it normal, not weird IYKWIM.

the benefits for siblings are just as important as for partners. it is about family and creating those deep, immediate bonds. on a biological level it also gives off amazing oxytocin for all present in the room (the hormone of love!) and this can really really be beneficial for siblings to experience this and helps with connection. i mean, to me it makes perfect sense. but yeah, i do recommend a support person for your DS as labour can actually be really boring for them until birth time (or at the very least lots of activity books/dvds etc).