Yes, it is very possible if you like HTML and JavaScript.
SCORM supports many complex scenarios, but the dirty secret of most e-learning development tools is that they use only the most SCORM barebones: bookmarks, completion status, and ratings. Adding this barebone level SCORM support for the manual HTML / JS course is very simple, and in the simplest cases it only takes a few hours.
There are many libraries that will help you get started, so you donβt need to reinvent the wheel and not get into some details like jQuery vs vanilla JS.
The organization that created SCORM provides the shell. They updated it in 2011 ; it is now much better, although it still suffers from global pollution of the namespace.
Andrew post defends Rustici Software tools (he works there). They are great guys, SCORM and xAPI (Tin Can) experts, and their code is solid, but their code is not open source, if that matters to you. (FWIW they have an excellent online table for SCORM time calls , I use it all the time.)
I have heard good things about JCA Solutions products, but have not used their code myself.
In 2008, I wrote my own SCORM shell (open source available on GitHub ) that met my own needs - your mileage may vary, I wrote this in part because I was unhappy with the wrapper provided by ADL at the time. Their shell suffers from global pollution of the namespace and does not provide error handling. I noticed that I continued to write the same error checking and conditional logic on my courses again and again. I decided to move some of this to the shell to keep the minimum course code and DRY. If you're interested, I wrote a simple tutorial to add SCORM to an HTML file using my cover (note that this is a single HTML page, if you use multiple pages, you will need to use iframes to prevent accidentally killing the API connection).
My wrapper is old and not perfect, and I am not a self-promoter. I suggest you try all the wrappers mentioned by the other posters and find the one that seems the most natural / intuitive for you, best suits your coding style and meets your licensing requirements. All of them protect you well from difficulties and help you start your course.
Bottom line: you donβt need to use ready-made development tools, HTML is a great choice, and as you can see, there is a decent community that can help you.