LOW QUALITY IN .MP4 VIDEO CREATED FROM AN ANIMATION

Hi! I'm starting doing some animations from assemblies but the .mp4 animations I generate have so less quality, I've adjusted the fps but I don't know why the image quality is so low in the final video. These are the configuration I've adjusted:


But still the quality is not good


Thanks in advance, 


José Luis 

Edu ​​​​​​​