Maybe Inking Habitat? Note the ability to export to EPUB3, which can include video, and there are EPUB3 reader apps for all platforms. If you want to sell the

Maybe Inking Habitat? Note the ability to export to EPUB3, which can include video, and there are EPUB3 reader apps for all platforms. If you want to sell the ebook on Amazon, you'll probably have to convert it to KF8. Edit: If you want to edit EPUB3 directly, you could use a plain text editor, but you would make your life a lot easier using an EPUB3-aware editor like BlueGriffon EPUB Edition.