The difference between ‘useful’ and ‘valuable’ is commonly just a matter of effectively communicating the value which an item or in this case, knowledge offers.
To illustrate this, let’s take an example of a carpet cleaner.
At face value it’s a manual job where they just clean carpets.
However a good carpet cleaner who knows his trade, will have a wealth of knowledge at his disposal which serves and protects a customer in many ways.
For example, they know that cheap cleaning products are prone to bleaching carpets and leave residues that are harmful to children and pets.
If they use too much water pressure a cleaner can tear the backing of a carpet.
And a cream wool carpet can be turned pink a few days after a clean, if the PH balance is not carefully restored.
A cleaner with that knowledge will serve the customer very well because their children or pets will not suffer upset stomachs from coming into contact with harmful residues. And their carpets will not be damaged either.
So that knowledge could easily be turned into a video product such as a consumers guide to carpet cleaning. That product could either be presented as a valuable free resource on their website. Or as an incentive for data capture.
If you have knowledge which is more in-depth, you could opt to produce a series of short videos. A series of videos would in turn be presented as having an even higher value still.
The important thing is that your knowledge should be packaged and presented as being valuable, if you want to have people realise its true worth and you benefit from that realisation.