I have created a WebM video with a transparent background that I am using as a background video. Unfortunately the alpha channel doesn’t appear to be working when I publish and view in Chrome. The transparent area just shows as black:
Thanks for posting about this — it definitely sounds like odd behavior.
What sites are you seeing this issue occur in – only this project or multiple projects? When did it start occurring? Can you send me the site Read-Only links please?
Could you also please let me know what browser version you’re using by sending me your information from this page?
There should be a small share link when you visit the page which you can send to me.
Notice the black background on the video… that should be transparent. I encoded the video with the alpha channel so I would assume the black area should actually be showing the red background.