feature
Substack Notes support video attachments and user mentions
typefully.comagent
Typefully now supports attaching videos (up to 15 minutes) and mentioning other users in Substack Notes. Videos are preserved when cross-posting from X and LinkedIn instead of being dropped, and Typefully validates content against Substack's constraints before publishing.
Stacks this affects
Typefully ships in 3 tested stacks here.
More Typefully
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