Upload Failure

I used H5P back in 2019 before an account was required and there were upload limits, and built major content for a class review as one file. I had to download it to use it back then, and since it is a roughly 60MB file, I am unable to upload it to my created account (I get the error 413 message which I believe is because the max upload size on h5p is a tiny 16MB?). Obviously I cannot open the .h5p file anywhere at all, so all the work I put into it before is practically wasted. Does anyone know of anything I can do?