I know this jib and worked successfully with it before. This accident was caused by a absolute lack of balance on the jib arm. No matter how high a jib arm is on that column, if it's in balance, things are fine, the jib is designed to carry a camera, DOP and AC. Thinking that the rod mounted between the jib arm and dolly replaces the purpose of the counterweights is a stupid thought and causes accidents like these.
For those who are interested, the jib used in the video was the Movietech DuoJib with the Movietech Magnum dolly.
Here a quote from the Duojib user manual: (Link, page 17)
Attention: Before set-up and at all times during operation, ensure that either Drive Ramp 3 or 4 is
selected. Do not operate the Duo Jib on Drive Ramp 1 or 2.
In the event of a power failure due to an electronical or battery cut out, it is recommended to have an
appropriate ladder to enable the camera crew to dismount.
Attention: Do not use pneumatic wheels when mounting or operating the Duo Jib!
1. Extend all 4 wheel arms of the Basic Dolly fully (pos. 1, page 8).
2. Mount the middle section (pos. 16, photo 3) of the Duo Jib onto the column by connecting it to the Euro Adapter
3. Connect the Connector Rod (pos. 7, photo 3) to the Anchor Bracket on the column (pos. 9, photo 3). Insure that
the Automatic Locking Pins are locked securely.
4. Connect the Connector Rod (pos. 7, photo 3) to the Anchor Bracket of the Duo Jib of the Duo Jib
(pos.5, photo 3). Insure that the Automatic Locking Pins are locked securely.
5. Lock the middle section securely with the fixing lock (pos. 8 photo 3).
6. Mount the end section (pos. 4, photo 3) and tighten securely with the end section lock (pos. 18, photo 3).
7. Attach the Counterweight Triangle (pos. 3, photo 3) to end section.
8. Connect the parallelogram rod (pos. 19, photo 3) to middle section and counterweight triangle. Insure that the
connection pins (pos. 1 and 17, photo 3) connect correctly.
9. On the lower connection of the front section (pos. 14, photo 3), mount, High / Low Rig (pos. 13, photo 3).
Insure that locking lever ( pos. 12, photo 3) is locked securely.
10. Connect the Platform (pos. 10, photo 3) to High / Low Rig. Insure that locking lever (pos. 11, photo 3) is locked
securely. Maximum Payload capacity incl. 2 pers = 220kg / 485 lbs. For other versions see the following
11. Insure that all connections are locked and tightened correctly.
No more than two counterweights should be loaded whilst the platform is unloaded. As a general rule of thumb, for
one person on the platform attach 4 or 5 counterweights, for two persons on the platform attach 8 or
When operating the Duo Jib attention must be payed when mounting and dismounting the platform.
By two-man operation, remove the extra counterweights before one person dismounts i.e. no more than four or five
counterweights should be left connected. Before the second person dismounts, reduce the amount of counterweights to
It is not recommended to drive the Duo Jib when the platform is unloaded and counterweights are
attached. At all times attention must be payed to balance.