There is clearly some interest in this area e.g. DS-PITON project (See https://bit.ly/35Eq35R) or the Jive project for java (https://cse.buffalo.edu/jive/). Another would be Glamours Toolkit for Pharo Smalltalk (https://gtoolkit.com/) - though it has a larger scope.
If you do not have time or funds to continue it in its current form and you do not have any 3rd party at this point interested in sponsoring development in some form, and you cannot see how to leverage it in the future - what do you have to lose by open sourcing it?
At worst - it languishes, and no one uses it but it will give you a referenceable open source project for your CV that may help attract work in this or a related area.
At best, the project sees adoption and opens new opportunities for you.
Given the quality on display in the articles and videos I would expect the project to get some interest especially amongst IDE and program visualization communities.
If you do decide to open source the project be careful on licensing choice (to encourage adoption in a manner you want) and copyright notices to ensure you are associated with it. Do expect to have to invest a little time in documentation and code clean up before making it available - but think of that as future advertising for your own capabilities.
Good luck