You can make a vlog on the transformation of Chandni Chowk
Explore places at champa gali or majnu ka tila.. it'll be scenic and fun
Historical Places will be best for these types of things.
You can go to streets of old Delhi, it's aesthetic and purely natural. Also for vlogging, forts are always a good option. Forts like: Firoz shash kotla, purana quila, Red fort, Humayun's tomb, Safdarjung tomb and lodhi garden forts.
You can go to Malcha Mahal and other hunting lodges in Delhi that are now categorised as haunted, But I would suggest that not to make videos of the rare and unknown things and places, to preserve it from more attention as that will lead to it's deterioration, I hope you understand what I'm saying. Be it rare.