Need help publishing my Captivate

I have created an online tutorial with simulation using Captivate (2019).  How do I post my publication into a platform like Teachable?  They accept .mp3, .mp4, .pdf., .png, .mov, .avi, .jpg.

I can also upload an url…but when I try to upload the index.html file – the screen is blank.

I’m new and have watched lots of videos and read lots of postings (thank you!!!) but I am stuck at the moment.

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