A cross of two noid generic Phals, 100 seeds, $4.99??
Even if I thought the seeds were genuine, and viable, not worth the money. If you don't mind losing $5, then I guess you can try it.
Growing orchids from seed is very difficult. If you want to try it, just to try it, get a blooming Phalaenopsis, preferably with a name tag, make your own "selfing". (Pod plant and pollen plant are the same), wait until the seed pods are ripe, go from there.
Simplest method to flask the seed is given here. I have tried it, the method works:
Very Easy Sterilisation Method - My Seedlings