Thanks to the references shared here and elsewhere, I've made an online script / tool that one can use to obtain all videos of a channel.
It combines API calls to youtube.channels.list, playlistItems, videos. It uses recursive functions to make the asynchronous callbacks run the next iteration upon getting a valid response.
This also serves to limit the actual number of requests made at a time, hence keeping you safe from violating YouTube API rules. Sharing shortened snippets and then a link to the full code. I got around the 50 max results per call limitation by using the nextPageToken value that comes in the response to fetch the next 50 results and so on.
function getVideos(nextPageToken, vidsDone, params) {
$.getJSON("https://www.googleapis.com/youtube/v3/playlistItems", {
key: params.accessKey,
part: "snippet",
maxResults: 50,
playlistId: params.playlistId,
fields: "items(snippet(publishedAt, resourceId/videoId, title)), nextPageToken",
pageToken: ( nextPageToken || '')
},
function(data) {
// commands to process JSON variable, extract the 50 videos info
if ( vidsDone < params.vidslimit) {
// Recursive: the function is calling itself if
// all videos haven't been loaded yet
getVideos( data.nextPageToken, vidsDone, params);
}
else {
// Closing actions to do once we have listed the videos needed.
}
});
}
This got a basic listing of the videos, including id, title, date of publishing and similar. But to get more detail of each video like view counts and likes, one has to make API calls to videos.
// Looping through an array of video id's
function fetchViddetails(i) {
$.getJSON("https://www.googleapis.com/youtube/v3/videos", {
key: document.getElementById("accesskey").value,
part: "snippet,statistics",
id: vidsList[i]
}, function(data) {
// Commands to process JSON variable, extract the video
// information and push it to a global array
if (i < vidsList.length - 1) {
fetchViddetails(i+1) // Recursive: calls itself if the
// list isn't over.
}
});
See the full code here, and live version here. (Edit: fixed github link)
Edit: Dependencies: JQuery, Papa.parse
