Slider video page does not work?

Using index-blog.html as my Index page, I have edited the slider images with no problems. When I got to the third frame which uses a video, webm and Mp4 which I uploaded correctly and edited the page to suit. First thing, Dreamweaver is telling me the two lines of video files need to be in double-quotes? Now I know no better, but it was the src and type values I had to edit. Still no videos? My brain thinks when it gets to frame three, there looks like something missing? But what do I know? Also, the poster image (explore-poster.jpg) Does not appear?
Every time I call in with a problem, it is usually my fault, I admit it.
I hope you can help me....

Abel

As usual, the fault lies with me. What I found was, that although the code for the video looks stunted, it is in fact set out as per the other pages but the video(s) take the place of the single images in the other pages of the slider. I thought the video tags were a 2nd stand-alone step in the slider? No, I was wrong. I always think, go with your first impressions. Yes, but then screw that up and look again....
Cheers

Thanks for that. Sadly

<div class="swiper-slide-bg" style="background-image: url('images/slider/swiper/2.jpg');"></div>

Does not appear in the code? Remembering the code that is "live" is the renamed index-blog.html now appearing as index.html

<div class="swiper-slide-bg" style="background-image: url('images/slider/swiper/1.jpg');"></div>

Is present in the original and my butchered version. But removing the 1.jpg line would not do anything that you are trying to help me with, I hope i can say that...

Removing: <div class="swiper-slide-bg" style="background-image: url('images/slider/swiper/1.jpg');"></div>
Just gives a white, first slide?

Cheers

Abel....