Substack, a San Francisco-based publishing platform, aims to release a short video feature in its app as the TikTok ban looms.The feature allows creators to make TikTok-style videos, with a maximum length of ten minutes, within the Substack app.Substack's move into multimedia comes as 82% of its top-earning creators are now using multimedia tools, up from about 50% last year.The deadline for the TikTok sale is approaching, with potential buyers like Oracle and Microsoft, but no clear resolution yet.