When sculpting vertices for 3D models for YouTube, use tools like Blender (free) or ZBrush to adjust vertex positions, refine topology, or add detail—focus on clarity so details show well on 1080p/4K video.
Vertex sculpting here means shaping by modifying individual or grouped vertices: smooth rough edges for characters, add small bumps for props—ensure details are visible on YouTube’s common resolutions.
For beginners, use Blender’s Edit Mode: select vertices with Ctrl+Right Click, move (G) or scale (S), then preview with a solid color material to avoid overcomplicating models that look messy on screen.