It is not correct to pray following the imam on the radio or TV
Question

                Is it permissible for a woman to pray following the imam of al-Masjid al-Haraam on TV?.
Praise be to Allah.
    Shaykh Ibn ‘Uthaymeen was asked in Majmoo’ al-Fataawa 
    (15/213): can a Muslim – especially women – pray following a prayer that is 
    being transmitted via TV or radio without seeing the imam? 

    He replied: 

    It is not permissible for anyone to follow the imam via radio 
    or TV, because prayer in congregation means being together in the same 
    place, so it has to be in one place and the rows should be connected to one 
    another (i.e. immediately behind one another). It is not permissible to pray 
    via radio or TV because they do not meet these criteria. If we were to allow 
    that, anyone could pray all five prayers in his house, and Jumu’ah too. This 
    goes against the wisdom behind the prescription of Jumu’ah prayer and prayer 
    in congregation. Based on this, it is not permissible for women or anyone 
    else to pray following the radio or TV. And Allaah is the Source of 
    strength. 

    The Standing Committee (9/218) was asked: 

    Is it permissible for women to pray Jumu’ah prayer in their 
    houses, and all the other prayers, following the loudspeakers in the 
    village? Is it permissible for a sick person who cannot pray in the mosque 
    to follow the imam from his house through the loudspeaker? 

    They replied: 

    It is not permissible for men or women, weak or strong, to 
    pray in their houses, individually or in groups, following the prayer of the 
    imam in the mosque via the loudspeakers, whether that is an obligatory 
    prayer or supererogatory (naafil), Jumu’ah or any other prayer, whether 
    their houses are behind the imam or in front of him, because the obligatory 
    prayers must be offered in congregation in the mosque by men who are strong 
    and in good health, but women and men who are weak and in poor health are 
    excused from that duty. 

    The Standing Committee was also asked about a woman praying 
    in her house, following the radio or TV, if she can hear the recitation and 
    takbeer, if that is an obligatory or naafil prayer. 

    They replied: She is not permitted to do that, regardless of 
    whether it is an obligatory prayer or a naafil one, even if she can hear the 
    recitation and takbeer of the imam. 

    Fataawa al-Lajnah al-Daa’imah li’l-Buhooth al-‘Ilmiyyah 
    wa’l-Ifta’, no. 6744.