As the builder of '96 (older) -6A, the photographs of the 7A tipping over are distressing. I could not find the video but here is what I see from the 4 photos.
The a/c is a later RV-7A which should have the upgraded nose gear leg and looks like it has the later nose fork.
A number of factors show that it was traveling at a very low groundspeed, i.e. multiple reference points in the photos, the way the props are bent, the proximity of the initial prop strike in the sod and final resting point, the fact that at the second photo both occupants have already braced themselves for impact, and that the impact vectors are almost completely vertical, being absorbed mostly by the dome of the canopy, which appears to have broken, and the roll bar, which did not fail, and which forced the longerons and fuselage skin to crumple. Furthermore, there is no apparent subsequent disturbed ground and the rudder position has not changed, which it should have, after impacting if the plane had slid. Also the primary point of failure appears to be the nose gear leg at a point just above the fork since it is bent a full 90 degrees aft, but the rest is not visible. So, my best guess is, the aircraft was taxiing at a relatively slow speed, was arrested by the sudden stoppage of the nose gear, and flipped over.
If this kind of thing is still happening since the new gear leg has been deployed, Vans needs to do a systematic review of the RV incidents involving nose gear failures, and, unlike some of the alternative engine vendors, who supposedly have not been admitting their problems, publicly disclose what the findings are. If not Vans, the FAA.
BTW, I have already bought the new beefier nose gear leg (U-603-2) which was $175 plus $40 freight. Now it looks like I will have to check out the new fork too.
Oh, yeah, and not land on grass when (if) my plane is built.
Dave A.
RV-6A