user_element: The user material
width: Width of the video, default value is 720
height: Height of the video, default value is 1280
element_duration: Duration of video
action_configDict: Provide users with the ability to modify
the configuration of internal actions with caution
element_configDict: Provide users with the ability to modify
the configuration of internal element with caution
fadeinTime: Duration of fading in.
fadeoutTime: Duration of fading out.
fade:
None: Add fade-in and fade-out elements
in: Add fade-in elements
out: Add fade-out elements
alpha_list: Transparency control list