Quick question from an SLF? In that last vid I noticed the slides from the aft doors were at a very shallow angle and difficult (it looked like) to slide down. Got me wondering if there could be scenarios in which the slides are an obstacle to evac - or are they solid enough that they can be walked (run) along as well as slid down?
All aircraft types are different regarding the use of the slides if the aircraft comes to a stop at an abnormal attitude.
For example on the B744, if the aircraft tips on its tail, then doors 1 would not be used in an evacuation (too steep). In a belly landing, all doors would be useable, but doors 3 (overwing) would be selected to manual (no slide deployment) and people would be evacuated onto the wing - otherwise the slides at door 3 and 4 would meet.
Cabin crew are trained in these scenarios, but would also visually check outside for hazards prior to opening the door, or redirecting passengers to another exit.
But yes, where a slide is too shallow to "slide" on, they are rigid enough to walk on, just as they would be when used as rafts.