3) Live Broadcasting
Shaykh Mufti Taqi Usmani (may Allah preserve him) and many other scholars have declared that live broadcastings of images do not fall within the ambit of picture-making (taswir). A picture is something that is permanent and static, whilst the image broadcasted live is not permanent hence cannot be termed a picture. A live broadcast is in reality a reflection of the actual image, similar to seeing an image in a mirror.
Therefore, if an image of a human or animal is broadcasted live, then this does not fall into the unlawful picture-making. It will be permitted to broadcast something live or view a live programme, provided the content of the programme is lawful (halal). (Taqrir Tirmidhi, 2/351)
4) Video Recording
According to Shaykh Taqi Usmani, that which is recorded in a videotape or DVD is also not considered a picture. In a videotape, the particles of an image are gathered and then re-opened in the same order to view the image. This is the reason why it is not possible to see the picture in the rail of the tape without playing it. (ibid)
Therefore, if a permitted and Halal event, such as a lecture of a scholar, is played and viewed on a videotape or DVD, it will be permitted, Insha Allah.
Note that the above discussion does not in any way relate to watching Television. Watching TV and keeping it at home is another matter altogether, for which a separate answer is needed. The many harms and evils of keeping a TV at home are known to all. This answer only relates to the permissibility of viewing a Halal image through a live broadcast or a videotape/DVD.
Shaykh Taqi Usmani (may Allah preserve him) sums this up in one of his Fatawa:
“The images appearing on live programs or recorded programs on television are not the pictures in the strict sense envisaged in the Ahadith of the Holy Prophet (Sall-Allahu alayhi wa sallam) unless they are printed in a durable form on paper or on any other object. But the basic reason why Muslims are advised not to keep TV sets in their homes is that most of the programs broadcast on the TV channels contain impermissible elements.” (Taken from the al-Balagh website, http://www.albalagh.net/qa/video_chips.shtml