I want to make this 30 day singer video player

I want to make this 30 day singer video player. A video plays on top. You can go to the next or previous lessons with the buttons underneath. You can click on the mp3 files to download. There isa floating frame at the bottom with a table of contents. A circle appears beside each lesson that you are on. This was made in webflow and Wistia. How do I make this? I have browsed all of the video lessons. I found ‘how to embed a video’. But, I don’t know how to make the previous and next buttons. How do I make the floating frame with the scroll bar?


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![30-day-singer-player-screenshot-with-jpg|690x388]