#!/usr/bin/env bash

urls=( $(grep -Eo '^https?://www.youtube.com/watch\?v=[[:alnum:]_-]{11}' </dev/stdin) )
valid_urls=()
for url in ${urls[@]}; do
    if youtube-dl -qs "$url"; then
        valid_urls+=("$url")
    else
        echo "Failed at $url"
    fi
done

mpv --no-terminal "${valid_urls[@]}" &