I did other tries finally I solved the creation of the video post with the “item portfolio” menu.
But it seems to be a wordpress issue bacause I just had the same trouble with the classic wordpress post… A first try was successfull, but a second try just give me the same trouble as creating a VP itemp portfolio video post type : I couldn’t paste the video URL… just weird !
Anyway : when creating the item portfolio video type post : I followed this steps :
1. I add a new item portfolio and select the video option (but the video URL form didn’t appear)
2. Just save the post as it si (with the option video post type checked)
3. The I edited the post : now the video URL form appeared
4. I Paste the video URL in the form (but it seems to have no effect)
5. I saved the post another time, by clicking on Update, even though I didn’t see the result.
6. Finally I edited the post another time : the URL appeared in te form !
7. I Saved the post by clicking on update.
So this results to be usefull for me, to achive this first task.
But now, I just can’t add this post in a post grid block presentation, as I mentioned above. The plugin just reconize posts with a thumbnail I guess…