Problem imbedding Youtube Video

hi,
(Ezrul Fazwan wrote me i should start a new thread)

i tried to imbed a youtube video with a block with composer it doesnt work. Now because i know JCE i switched to JCE as default editor.
I tried now three things to find the error:

1) In a first line I used the button "insert Video" outside JCE on the top (this line is shown in the editors line: [embed=videolink]{"video":"https://www.youtube.com/watch?v=7dI2__hlo-4&feature=youtu.be";,"width":"400","height":"225"}[/embed]

2) In the second line I used the button "Video" within JCE, select "youtube" and insert the URL.

3) In the third line I make a hyperlink to the Youtube Video

After save i saw that in 2) nothing is saving in the editor ( i see it when i switch to html view)

Result: 1) and 2) are not showing the Video inside the post when i use a menu-entry with: category/view single category
If you want you can see it on: http://www.fcstarkenburgia.de/junioren

1) shows the video when i select the post and let me show the complete article.
look at: http://www.fcstarkenburgia.de/junioren/d-junioren/d1-junioren/d1-news/d1-einlaufen-in-huettenfeld

3) worked, but i dont like use a hyperlink at this point: http://www.fcstarkenburgia.de/junioren

My question is, how can i get a video displayed on the category sight.

Thx
Otmar