引用自 Dels：

I'm sorry to say that I tried to changed the Videos you were using to put those you use in your showdown 11, but doesn't work at all, I only have a white screen at the place. And for the Overlay, it takes the front place. Means I don't even see the audio bars or even the logo I put.

Can you tell me what to do ? Also yeah the unsub-subagain doesn't work

1. Renaming a video as 1.webm will not work, you need to use a software to convert the video. Search for MP4 to webm converter()
2. Simple understanding. I take an image make wholes to see through it (png to save transparency!)and add it as an overlay, In the video you are referring to I erased the center part of image to see the logo and video which are behind it(used photoshop! for that), also reduced the opacity of the image overall and that is the reason you are seeing part of videos on image :)

if you need more help you can add me on steam :) will help you sort it out!

I added you on steam :) buht thanks that help a lot to understand those customizations better.