Problem Solved: I've reached fiverr support but they said your gig(They don't reply about video gig) is live only. I simply delete the video & reupload it within a minute, video was live 🙂
On 14.04.22 I've uploaded a video on my existing gig to boost my reach. Till now it says 'Under review by our Trust & Safety team' So how long it will take to process my video? I'm already working on another video for my other gig.