Filming conferences and celebrations on video

Shaykh ‘Abd al-‘Azeez ibn Baaz (may Allaah have mercy on him)
was asked this question and he said: 

If there is the hope that
the general interest will be served by filming the party, conference or
meeting in which people are called to Allaah, and if it is thought that this
will do more good than harm and that this will have good consequences and
benefit the people, then there is nothing wrong with that in sha Allah.”