animation: "slide" causes component disappear after click video contextmenu.

[aboveyunhai]

Issue regenerate: https://jsfiddle.net/7m259pjx/1/

animation:"fade" works normal when click the context menu of h5 <video> tag but video will display none in animation:"slide"

[seanmortimer]

For anyone else coming across this, adding video: true to the slider options fixed it for me.

I found the option here: https://gist.github.com/warrendholmes/9481310