Daughter is almost two and only knows her abbu from the phone

My husband works in Saudi. He calls every night on video. My son is 5, he remembers his abbu from before and talks to him properly. My daughter was very small when he went. Now she kisses the screen and says abbu, but when I show his photo she doesn't always know it is him. I am worried that when he comes home she will cry and not go to him, and he will feel bad. How to make a small child know her father when he is so far? Mothers whose husbands are in the Gulf, what did you do?