Is there a website that works like youtube but for audio only? Because otherwise thoughtfully produced videos are going to be the best way for someone who doesn't know how to use a screen reader efficiently to gather information.
Podcasts generally are the audio alternative to YouTube. Thankfully, podcasts remain largely decentralised and aren't restricted to a single website or service.
Podcast search is something of a challenge. There are a few websites that claim to do this though in my experience they do so poorly.
Podcast Republic (Android & iOS) is an app I've used that has an excellent podcast search capability --- both podcasts as a whole and individual episodes, with shownotes indexed (protip to podcast creators: your shownotes are themselves and excellent discovery tool, do not neglect them).
PR isn't my main podcast driver (I use AntennaPod from F-Droid), but I will bring it up to search for specific content when I need to do so.