From a mate of mine on the recovery team...(this is after all a rumour network), the 310 lost an engine, possibly both prior to the nose gear collapse so she must have injested some of the deris. The nose gear collapsed backward either from hitting something hard or from impact with the tarmac as she might have been in the early stages of rotation. The crew really just had to hang on and hope for the best as the TR's were inop and control was limited.
The video is from one of the security cameras from the new EK hangers and not from airport surveillance hence the angle.
Once again, this is a rumour network so all this is his opinion.