Seamless Animated YouTube Video Edit

I have fifteen high-quality, 9-second animation clips that now need to feel like one continuous piece. Your job is to stitch them together with subtle, smooth transitions so the flow never distracts the viewer... (Budget: $30 - $250 USD, Jobs: Adobe Premiere Pro, After Effects, Animation, Audio Editing, DaVinci Resolve, Final Cut Pro, Video Editing, Video Services)