The Camera Phone Bus Bomb 7/7

Footage apparently taken by the eye-witness who spoke to Anna O'Neil on John Gaunts BBC radio show. Initially, Anna twice said that the footage she'd seen showed the actual bus explosion but she denied this shortly afterwards, after all. Full recording of Gaunts show here, four hours long - https://www.youtube.com/watch?v=xjW_TPv3y8w
The eye-witness claims to have seen similar events in Israel. Who was he?
*edited to highlight the conversation about the camera phone recording, only 3.5 minutes long* - https://www.youtube.com/watch?v=_31akqHaRAQ&t=51s
This video has been slowed down twice, to illustrate that it has been edited, chopped up & re-arranged. But also that even the immediate aftermath of the attack appears to show too few injured & dead.
Thirteen were killed at this attack, eight left with traumatic amputations & over 100 left walking wounded. - https://www.youtube.com/watch?v=nv6YA7-mAJQ&t
Where are they all? Even clear stills on the day, also taken right after the blast, show only one fatality on the bus & far too few wounded strewn around.
Something is not right.