Yes, with proper licensing. AI music from Solmi Pro, Suno Pro/Premier, or Udio paid tiers includes commercial use, which makes it safe for monetized YouTube channels. Free-tier output is personal-use only.
Generally no — the audio is novel, so YouTube's Content ID won't match it against existing tracks. But if AI mimics a specific song too closely, you may get a manual claim from the original rights holders.
Yes — TikTok allows AI-generated music in the Creator Rewards Program as long as you have the rights. Use paid-tier output from a tool with commercial licensing.
AI music is faster and cheaper for variety (every video gets a unique track). Stock music is safer if you need guaranteed-clean licensing for high-stakes commercial work. Most creators use both.