how to convert a file to a document but keep the videos

hi , im like a tech dinosaur and really struggling . i ahve created a doucment in adobe express , a lash styling manual- it includes videos- when i download it it saves an individual files and i was hoping to be able to upload this as an education tool / almost like an ebook to my website but have no idea how or where to begin , any help. would be appreciated . thankyou