Publish your YouTube podcast on iTunes and Spotify
From a YouTube show to a published podcast in less than 5 minutes
Add your YouTube show on the main page.
Once it's imported, go to "Edit" and fill out the iTunes required info (Artwork, Category, Owner, Explicit).
Copy the RSS URL (Spotify supports only audio, iTunes supports both):
Go to iTunes and paste that URL:
Submit it for review. After 3-4 days you'll get an email that your podcast is approved. Eventually it'll appear in searches in every podcast app except Spotify.
(Optional) Submit your podcast to Spotify:
As long as you have an active subscription to the Creator plan your podcast will be automatically synchronized with YouTube.