How do black Molly fish have baby?

heres my link to it

Not sure if black mollies are ready to give birth one belly is real big. i asked for a pregnant mollie from clerk but dont know when it will give birth. this one has a white spot near anal fin and has a black dot right in top of it but this fish is wild and loves to nip at otherfish she is not calm like she is giving birth she seems stressed please help

i have a smaller molly with a big stomach she is calm and stays in the middle or bottom of the tank she has a white spot near the anal fin so i need help on that plz

if you want a video heres the link YouTube.com/watch?v=scK3YJsPPMQ&feature=autoplay&list=LLgQLeDfpSNs-OMzZrixIFSg&lf=mh_lolz&playnext=1">http://www.YouTube.com/watch?v=scK3YJsPPMQ&feature=autoplay&list=LLgQLeDfpSNs-OMzZrixIFSg&lf=mh_lolz&playnext=1

and here is another video

http://www.YouTube.com/watch?v=Wet6lcaQB58&feature=mh_lolz&list=LLgQLeDfpSNs-OMzZrixIFSg

please tell me wich one is or if they both are and when she will give birth if u know Please

i ment is my