Is baby safe? Crib help!

So my baby can’t roll well yet. I’ve randomly seen her roll from tummy to back during the day but it’s very hit or miss. Usually she just cries till I roll her to back. she hasn’t mastered it and the only time I’ve since her do back to tummy was today and it scared the absolute hell out of me.

She puts her feet through her crib slats then uses its to push and roll over the only thing is she gets stuck and it’s scares me cause she is now face down legs stuck in slats and can’t roll back. I’m scared she is going to suffocate. She is only five months and she can hold her head up pretty well but still gets tired during tummy time and like I said isn’t even near mastering rolling. I just went and bought this expensive camera to watch her now today after finding her face down with legs in slats all the way to her thighs. Here is a pic of her kinda doing it, only she will be face down not on her side. And legs will be more straight through hole with body going opposite way of how she is supposed to lay in the bed.

She is obsessed with using her feet to push on side of crib or put them through the side and it’s constant. Is this safe? What can I do to keep her from doing this? I think once she masters rolling better I’ll be less anxious but my cousin suffocated at 6 months like this in the 60s (never met him just grandma told me what happened it it is exactly what my daughter did today) She sleeps right next to us in our room. I’m scared to move her out after this. Please help I feel crazy anxious. Am I being overly worried? Also she wears a zipadee zip. Should I take that off till she learns to roll better? K