Another fan of PHP Melody here, if you already have your video and thumbnails encoded. It is a Youtube like clone that has some pretty cool features. Because it does not require ffmpg it will run on pretty much any hosting provider, but if you want to run it on a small vps it will run stack on a $5/Linode.
Tech Howto:
https://theserveradmin.com/caddy-plus-php-melody/
Live Example with Users disabled:
https://amateursexyvideos.com/
Thanks,
Anthony