I’d be happy to help with some legwork (though I’m not developer), e.g. if I was given an Excel in the correct format I could fill the cross references into it.
The document you linked to is, unfortunately, copyrighted. I used the public domain data that I had access to. If you were aware of a public domain source for uncopyrighted text with Scripture references, I could likely scrape and import that.
Having said that, though, I’m not 100% sure if the documents you mentioned originally had footage. I remember reading somewhere that they were added later by various denominations—but I’m not 100% sure on that, nor could I provide a source.
Re the original version I posted, I can request copyright permission from the owners as I know them very well (and I’m fairly sure they’ll grant permission), could this be another option?
Lastly, I’m not an expert on copyright law, but perhaps the “extraction” of proof texts only (and not the entire text) could be considered “fair use”? Though this may require acknowledging the source somewhere to avoid plagiarism.