Headless CMS for Video/Audio Sharing & Streaming Website

- Hey, I'm looking to build an Audio website similar to Soundcloud (allow users to upload audio to stream) and the site will be able to upload Video as well. - Looking to use cms to manage this, was looking at an Open Source Headless CMS but if you have something better in mind I 'm open to other suggestions of technologies. - Also looking at using AWS for hosting (elastic beanstalk), and AWS s3 and AWS transcoding. - If you feel that you can handle this project we can go over the details more. QUESTIONS 1. What experience do you have with a Headless CMS? 2. What are the issues with Headless CMS? 3. How would you solve Headless CMS SEO problems? 4. Do you have a GitHub or repo of any of your projects?