Content creation

what happens when one author is working on a course presentation and tries to save while another author is also editing the course presentation. There is a message that it can't be saved. But is it possible to checkout content when an author is editing the content so another author can only view it and not edit? Or is this standard cms functionality..

Hi is it possible to edit or create a H5p content from WP front ?
If not, is is possible to add the "add H5p" button in WP article edit in front ?

Thanks
regards

when placing a graphic with an irregular form created with a transparent channel (e.g. the colour white defined as transparent in a PNG file) over an interactive video on a slide the irregular form displays over the interactive video.because the white channel becomes transparent (when the opacity setting is set to 0) However, the same graphic place over interactive video by using the interactive video editor displays as a rectangular shape, because the transparent channel shows up as white. This is indesirable for creating interesting interacdtions.