Professionals don't release unedited broll.
The video
is edited.
This is a
b-roll.
The point of a
b-roll is to have all of the filmed footage edited into the bits most useful for creating a final edit - including multiple camera angles of the same shot.
An
un-edited
b-roll would contain
all the footage that was filmed.
Non-Professionals don't release
b-rolls. Any professional company
would release
b-rolls.
B-rolls are intended for
media outlets so that independent articles can be edited from the footage shot by the
professional company. It is a practice that has been in existence for years.
I have worked as a television editor for over 20 years and have edited many items using
b-roll footage, without which I would have been constrained to using the finished commercial released by the company, which is incredibly limiting.
This video
isn't a commercial, I doubt it was planned to be released to the public. More than likely it is a leak of rushes (raw material) that was intended to be edited (by the article creator rather than the company selling the product) into a final film appropriate to the article in which it is to be used.
The post says
"Mercedes-Benz has released a seven-minute B-roll overview video, shared by iFun.de." Note the
"shared by iFun.de." and
not "shared by Mercedes".
To summarise - It's not badly made, not made by an assistant and not intended to be released to the public. It's intended audience was the numerous media outlets.
If you want to see a
finished video then go to the suppliers of the final product: Volvo, Mercedes, Ferrari etc.
Sorry if this seemed like a bit of rant but I hate to see anyones work being trashed because of a lack of understanding.