Which gear does Paul Rogers recommend for achieving a dreamy cinematic glow?

For that dreamy, cinematic glow, here is exactly what recommends in that reel:

• Use a cheap clear filter on your lens (UV/clear protection filter)
• Smear a little Vaseline around the edges of that filter only, leaving the center clean
• Then shoot through it to get soft highlights, glowing halation, and a film-style vibe without expensive diffusion filters

Want a quick gear suggestion for an affordable clear filter for your camera or phone?