So I'm going to preface this by saying I have no video evidence to support my argument. Actually, there is video evidence, from one of my SKK studios (I'm actually in the videos), but they are password protected, and I don't think they want them shared here.
The videos that I'm aware of generally teach how to perform the movements. For that purpose, it's not a concern what the range is, or if the person would actually succeed with the attack. But when people learn it this is the general process from what I've seen: Initially like the video shows: an attack that will not hit, you practice the movement. Then, an attack that will hit, practiced in a drill, where you respond to the one specific attack. Then: The person attacks however they feel will be effective (could be an overhand swing, underhand swing ,stab, baseball bat swing, etc), and you respond with the appropriate tech for the situation. Than, you give one person a club one person open handed, and tell them go wild. The person who's attacking has the goal of hitting the other person with the club, stick, etc. as much as they can, while the other person has the goal of stopping them as much as possible. The reason you wouldn't see that in an online video is it's not actually teaching a way to block it; presumably the person already has learned all the ways to block it, and it's just a matter of using footwork, handspeed, and luck to be successful.
As a result, the footwork learning range is taught separately from the tech. Im not sure why that wouldn't be available on youtube, but I'm also not sure how to specifically google distancing footwork for weapons. As a side note, I learned most of my distancing techniques from fencing, and 2 of my kenpo instructors had experience in fencing, so that may influence my experiences. I can say that in my USSD studio, where they had no experience in kali or fencing, they talked about how the last 2/3rds of the stick/club are the most dangerous, and the importance of staying either fully out of range, or jumping in as quickly as possible to mitigate the damage.