3 motion graphic art studios that are successful

 Scorch Motion- https://www.wearefrantic.com/portfolio/burnout-games-trailer/

    This trailer from Scorch Motion, works because this trailer does a nice job with showing how the gameplay will be like. It also shows how much the effects and transitions work.  

Device- https://www.devicers.com/project/overlay/

This video looking at appears to be more animation in nature but is well done and continues to move the imagery along.

Bito-  https://bito.tv/project/final-blow/ 

This video caught my attention the most because of the simplicity of the appearance but is very well thought out and does it's job, by being dynamic and has an aspect of keeping the viewer entertained by consistently changing form.