Usage of な in this sentence


What is the meaning of な in the following sentence?

> この動画に映り込んでる背景は僕の家 **な** 気がする。

Is it an abbreviation of なんて or なんか? Or is it simply a filler as explained in
[this answer](https://japanese.stackexchange.com/a/28006/17797)?




In this sentence, you can replace 「な気がする」 by 「である気がする」.

→ "I have the feeling that this video's background is my house"




In this sentence, you can replace 「な気がする」 by 「である気がする」.

→ "I have the feeling that this video's background is my house"

