src/playlists.go

package main

import (
	"fmt"

	"google.golang.org/api/youtube/v3"
)

func getTitlesFromPlaylistID(playListID string, youtubeService *youtube.Service) []YTVideo {
	fmt.Println(youtubeService)
	call := youtubeService.PlaylistItems.List("snippet")
	call = call.PlaylistId(playListID)
	call = call.MaxResults(50)
	playList, err := call.Do()
	if err != nil {
		fmt.Print(err)
	}

	var videos []YTVideo

	for ok := true; ok; ok = !(playList.NextPageToken == "") {
		for _, item := range playList.Items {
			var video YTVideo
			video.Title = item.Snippet.Title
			video.ID = item.Snippet.ResourceId.VideoId
			video.URL = buildURLFromVideoID(item.Snippet.ResourceId.VideoId)
			videos = append(videos, video)
		}

		playList, err = call.PageToken(playList.NextPageToken).Do()
		if err != nil {
			fmt.Print(err)
		}
	}

	return videos
}

func embedAllVideos(playListID string, youtubeService *youtube.Service) string {
	videos := getTitlesFromPlaylistID(playListID, youtubeService)

	var html string
	html = "<html>\n<body>\n<div align='center'>\n"
	for key, video := range videos {
		html += buildEmbedCodeFromVideoID(key, video.ID)
	}
	html += "</div>\n</html>\n</body>"

	return html
}