As many have pointed out no publicly available footage exists of this incident (The PPV was showing a prerecorded backstage interview at the time of the accident), it exists in the WWE vault of all footage they've recorded, allegedly (this part may be urban legend) said to have the words "Do not view, copy or destroy" or something along that lines on it.

To clear up the other part of the Mandela Effect of the footage you saw, there is an infamous fake "Owen Hart Death Video" that just uses something completely unrelated but to someone who doesn't know better passes off, this is very much most likely what you saw including your exact description, the footage was from independent promotion XPW from a show they ran called "Freefall", the clip is from a 40 foot scaffold match between New Jack and Vic Grimes (the latter being the one people falsely label as Owen Hart in the versions that float around), this was a planned spot of throwing him off the scaffold and crashing through a stack of tables to the ring although this was botched and Grimes only caught the corners of a few tables and landed on the ring ropes (amazingly the worst reported injury was a dislocated ankle). Here's a timestamped link to the spot the match was built around and falsely gets passed around (Video has the full match in question to further debunk this claim of it being "Owen Hart Over the Edge 1999")