Question Black outline in transparent video

Hello

I have created an FX video in .webm format to be used in a VideoPlayer component on render mode Camera Near Plane. But when the video starts playing, all of the shapes in the video have a black outline around them, making the video unusable.

Any way to fix this?

 

Suggestion: I would first confirm if the WEBM file or playback is causing the problem. I assume its alpha channel meant to be fading out. My *guess* is playback only supports on/off for alpha (not levels) so anything above zero is "on". But it could also be the WEBM file was created that way too. Just wondering what the WEBM file looks like if you load it into Premier Pro or similar with a white background. If the black outline is in the WEBM file, then that is what you would need to fix. If its in the playback in Unity... ummm....