The linked 5-minute video provides a simple and undeniable proof that the real value of Bitcoin is zero. It does that by showing that Bitcoin lacks the fundamental feature for which all financial instruments exist in the first place, and that is to provide payment to their holders.
https://youtu.be/WSYTXmxPveYI don't need to watch the video. I just need to look at the price of Bitcoin right now. It says Bitcoin is price valued at $9,405.65. That is enough to debunk any claim that Bitcoin's real value is zero. The real value of a few thousand bills in my country is probably worth less than a couple cups of rice. And yet, because of the value we assign to those small cuts of paper, we can actually buy a sack of rice with them. Every value is assigned.
The real value for bitcoins is above $9400 as you said, but perhaps in the traditional world bitcoins might not have any value yet. In the real world, traditional payment systems are been encouraged which includes paper money, digital centralized wallets like PayPal, etc which can easily be traded by the people for a specific value. Their value does not keep on changing to major extend as the time passes by which as compared to bitcoins might never have a stable price.
Bitcoins have most volatile price which can't allow the people/investors to rely on a single stable price of bitcoins and this is what might have kept the value of bitcoins zero to the real world who do not have the ability to understand the graphs and patterns.