Add Media

insert file into post
Trick: You can insert the image as a “thumbnail”

Insert a Gallery:

    click the little picture above the text field
    click “ select file”
    upload the file
    choose size of the image, don’t choose the full size, its to big
    insert file into post
    click the little picture above the text field
    click “ select file”
    upload the file
    do that with all the pictures you want to upload
    in the menu of the upload manager you find “gallery”
    click gallery and scroll down to insert gallery into the post

To Insert a youtube Video:

click Edit in in the Page menu on the left side
Edit the Page Video
Go to Youtube
select your viedeo
copy everything in the Embed line you find on the right side
paste that into the text fielt of the page Video
update page on the right side