As TikTok’s future in the U.S. remains uncertain, Substack tries to lure creators to its platform by doubling down on video. The company announced on Wednesday that it’s now allowing creators to monetize their videos on the platform, and letting them publish video posts directly from the Substack app. Previously, creators have been able to share videos in Notes, which is Substack’s Twitter-like feed, but the Notes feature doesn’t support paywalls. Plus, subscribers aren’t notified when a creator...