Jewish mother, non-Jewish father - is the child Jewish?

Kolel L'horaah Ma'asis Crown Heights - Shiur 6 on halachic topics - by Rabbi Shraga Dovid Homnick, Sgan Rosh Kolel, on the question of whether children born of intermarriage between a Jewish mother and non-Jewish father are unquestionably halachically Jewish, and the opinions that they may in fact require giyur

https://www.youtube.com/watch?v=RZQz-8R7f-Y