Please read this well, if you do not understand ask me and I will tell you another way ok. This is all important.
1. You must get closer. When you go closer he will be at an angle so looking more up. Feed him from up, down. I will see if I have a video, if not I will make one.
2. remove the rubber tube, that is for crop feeding, so it is not necesary and is causing the mess. It will give you more control.
3. use two hands. With one hand, gently keep the babies head from wobbling all over the place, don´t grab him, just cradle him so if he pulls back he can ok. With the other hand use the syringe
4. You are feeding very slowly too, you see the baby swallowing but no food going in. It will fill him with air. The problem is the tube is falling out. when you remove plastic tube it will fix this too.
I really wish I was there so I could physically show you.