Yes you can in the portfolio single post item you should be able to see the striking options for the slider settings. If not : goto the screen options above your admin name and enable the striking general page options so the slider settings become visible down below in the single portfolio page.
For slider html5 how it works. i try this shortcode in body content: [iframe src="http://mywebsitecom/videos/video.mp4" width="575px" height="320"] Is there's anothers ways? thanks