Ok, I’m not going to comment on the second video, as my fingernails tend to be fairly soft and I keep them cut very short so they don’t snag and get turned backwards. In a nutshell, I don’t see my fingernails as a reliable self-defense tool. I can deliver a pretty powerful tigerclaw strike however, hitting with the palm and fingertips (not engaging the nails). I’ll leave it at that.
For the first video I have some comments. The first thing is that compilations like this, where it rather quickly cuts from one thing to another, often leave me wondering what, if any, consistent engine is under the hood. The compilation of short clips does not give me a chance to evaluate whether there is a systematic delivery system, or if it is just a collection of tricks designed as responses to particular types of attacks. Furthermore, if this is a seminar with attendees who do not regularly train with the instructor, then to the extent that a delivery system exists, how well do the attendees understand it? And if the answer is “not very well” then how effective can they be with the material that they learn?
Moving on from that, the material itself reminds me of the Ed Parker derived branches of kenpo, which includes the Tracy lineage which I trained in the past. The bulk of the curriculum consists of self-defense scenarios with an attacker, and a prescribed defense to be executed by the defender. Collectively these are usually referred to as “self-defense techniques”. Some of the ideas within these techniques can be good, others can be bad. How well they get trained varies from school-to-school, so it is difficult to comment on consistency of quality within these lineages. But at any rate, I think this approach to training would be familiar to anyone who has spent time within the Parker-derived kenpo lineages.