Once you have a piece of content, you've baked a cake. Now you can take this cake and slice it up. Serve those slices to different channels to reach new audiences. Some get smaller pieces, some get bigger pieces.
Serve a slice of webinar as a YouTube short.
Serve a slice of podcast as an Instagram reel with captions.
Serve a slice of talk as a Twitter quote.
Serve a slice of article as a LinkedIn post.
Don't serve people a mouthful of frosting (unless they're kids).
Serve them a lovely piece of cake instead that will leave them satisfied.