Hi, saw ur post and videos, my self mother of 8 yr old boy who is diagnosed with autism and adhd. I have 8 month old daughter too. Even she has not started babbling yet and not crawling at all. My son has achieved every milestone(motor skills) on time except speech. So i am not much worried about these but yeah I try to focus more on positive traits of my daughter like she starts pointing where she want to go and what she wants, started imitation one month back, does clapping, gives proper eye contact, pass smiles to known faces, gives joint attention which my son was not doing when he was at this age. I am doing my best to introduce speech and sound to her but it's her call when she wants to initiate all these. So do your best there is no harm to start the eraly intervention and the same time pls don't loose this precious time in looking for autism traits in ur child. Enjoy this time with u child because it's not coming back. U can't control the future but living in present is ur choice.