Hard to tell what’s going on from just watching the video, but it looks like Aximmetry isn’t getting any video input on the node you’re sending to Unreal. What is the video source? 

Hi TwentyStudios, I'm talking about the timer below the video input. it's like takes longer to render the text than changing for new numbers.

If I write a name and after I write another one there is like a transition that shouldn't exist.

Thanks in advance and best regards,

Ah, this is the Unreal Temporal Antialiasing or TSR and has nothing to do with Aximmetry. Unreal samples several frames and blends them to get rid of aliasing flickering. This is especially noticeable on animated textures and videos that doesn’t have any motion vectors to guide the algorithm and will cause severe smudging. Aximmetry has customized the rendering pipeline to get rid of this for their billboards and you can also enable it for other translucent materials by switching on the special Aximmetry flags in the material editor. But that only works for translucent materials and could probably cause some aliasing in the material border in the scene from your video. You can also tweak the antialiasing to have less smudging (ghosting) at the expense of more aliasing via console commands. Lots of information on this subject if you google.