well first off the screen size is pretty small, second there's not audio, third there's pretty much not animation, 4th half of the video was the same animation of different dragon just moving across the screen. I understand you're probably very new to animation and stuff, so I don't want you to take this as personal attack just straight up criticism and stuff I want to point out. My advice is to spend a little more time on these, add more frames in between, and use more reference photos of dragons and practice drawing them because frankly they look more like dolphins than Dragons.