R click → Media → Stream Media Source
Input the valid URL link at Stream URL column
Media Source With a Material
Create Media Player → enable video output media Texture Asset too
In Media texture: Enable Enable new style output.; Set Output format (new style) to Default (sRGB).
Create Material → call it MyPlayer_Material →
change its Material Domain to User Interface. This will change the Result node so that it has user interface outputs.
Drag the created video in event graph, connect its RGB to final color
If you are using a Texture Sample or Texture Object with the Electra Media Player, you will need to set the Sampler Type to Color.
Adding the Media Source to a User Interface Widget
R click → User interface → Widget Blueprint
drag an Image into the graph and stretch it to fill the grid's aspect ratio