S3 Video Hosting | Responsive Player w/ ability to serve ads.
Easy Video Player ($60)
– lazy loading / ability to interject video ads / offsite ads on pause and video completion– https://codecanyon.net/item/easy-video-player-wordpress-plugin/8537670
– https://preview.codecanyon.net/item/easy-video-player-wordpress-plugin/full_screen_preview/8537670
Offload Media Light
– this is the free version of the plugin / you have to get everything set up on aws for your s3 bucket then it is just a matter of updating some config files on yoursite.com– https://wordpress.org/plugins/amazon-s3-and-cloudfront/