Documented the newly added video demo

README.md

@@ -614,7 +614,8 @@ The [demos](https://github.com/verlok/vanilla-lazyload/tree/master/demos) folder
 | Content   | Lazy responsive images with the `<picture>` tag and the `media` attribute (art direction)      | [Code](demos/picture_media.html)               | [Live](https://www.andreaverlicchi.eu/vanilla-lazyload/demos/picture_media.html)               |
 | Content   | Lazy responsive images with `srcset` and `sizes` (using `data-sizes`)                          | [Code](demos/image_srcset_lazy_sizes.html)     | [Live](https://www.andreaverlicchi.eu/vanilla-lazyload/demos/image_srcset_lazy_sizes.html)     |
 | Content   | Lazy responsive images with `srcset` and `sizes` (using plain `sizes`)                         | [Code](demos/image_srcset_sizes.html)          | [Live](https://www.andreaverlicchi.eu/vanilla-lazyload/demos/image_srcset_sizes.html)          |
-| Content   | Lazy video with multiple `<source>` tags                                                       | [Code](demos/video.html)                       | [Live](https://www.andreaverlicchi.eu/vanilla-lazyload/demos/video.html)                       |
+| Content   | Lazy video with multiple `<source>` tags, different preload options, NO autoplay               | [Code](demos/video.html)                       | [Live](https://www.andreaverlicchi.eu/vanilla-lazyload/demos/video.html)                       |
+| Content   | Lazy video with multiple `<source>` tags, different preload options, WITH autoplay             | [Code](demos/video_autoplay.html)              | [Live](https://www.andreaverlicchi.eu/vanilla-lazyload/demos/video_autoplay.html)              |
 | Content   | Lazy loading background images                                                                 | [Code](demos/background_images.html)           | [Live](https://www.andreaverlicchi.eu/vanilla-lazyload/demos/background_images.html)           |
 | Content   | Lazy loading multiple background images                                                        | [Code](demos/background_images_multi.html)     | [Live](https://www.andreaverlicchi.eu/vanilla-lazyload/demos/background_images_multi.html)     |
 | Content   | Lazy WebP images with the `<picture>` tag and the `type` attribute for WebP                    | [Code](demos/picture_type_webp.html)           | [Live](https://www.andreaverlicchi.eu/vanilla-lazyload/demos/picture_type_webp.html)           |