Well, it could be a fan - made story where Sakura, from the Naruto series, plays a crucial role in saving Obito. Maybe it involves her using her medical ninjutsu skills to heal him from some critical injury or her strong will to bring him back from the dark side he was on.
Yes, there is a Ninja Kamui manga. It has gained popularity for its action-packed scenes and interesting character developments. Many fans enjoy collecting and reading it.
Naruto using Kamui could change the power dynamics in the Naruto universe in the fanfiction. His battles would become more unpredictable. For instance, against strong opponents like Madara or Kaguya, Kamui could be used in creative ways. He could use it to send parts of their attacks to another dimension, or quickly dodge attacks and counter - attack from unexpected angles. It also might make his allies view him differently, as this new power is something very different from his normal ninjutsu.
In many fanfictions, Naruto might initially discover Kamui through an encounter with Obito or Kakashi. Maybe during a battle where he witnesses the power of Kamui first - hand, and his inquisitive nature leads him to start exploring how to learn it.
[The behind-the-scenes footage of 'Chen Qing Ling' was deliberately filmed.] These behind-the-scenes were performed. Someone had specially written the script to let the audience feel the emotions between the characters in the drama more realistically and increase the popularity of the drama. Most of the time in the crew was spent playing with their phones, so the footage that could be played was carefully planned and filmed. Therefore, it could be said that the behind-the-scenes footage of " The Order of Appearances " had been carefully produced and was not fake.
In some fanfictions, Naruto might acquire the ability to use Kamui through a special encounter. Maybe he meets an ancient sage who imparts this power to him, seeing Naruto's potential and his need for an edge in battles against powerful foes.