Embedded videos play black screen in posts

Please post a link to your site.

https://aegisub-dojo.garoo-blog.net/gallery/softsub/evangelion-1-01

I can see the issue. Are you using the video shortcode?

I can play those webm files directly but they don’t work within those players.

Yes there are no problem with video, in fact even .mp4 videos experience the same issue.

I embedded those videos with “add media” just like normal, but also tried 3 other player plugins with shortcodes and got same results.

Is there any solution to this?

Please show how you’re embedding the videos

1) Add media:
https://i.imgur.com/YV85GxG.png

2) Select the uploaded video:
https://i.imgur.com/liZQsda.png

3) Done:
https://i.imgur.com/FT0Lfyb.png

4) Video doesn’t play in posts, only audio plays:

OnPaste.20160620-055646