Get LIKED youtube videos via API - youtube

Question

I know how to get the count of 'liked' videos using the YouTube API, but I want to get a list of those videos.
After reading the docs, I think it can be done by getting the 'liked' playlist, but I do not know exactly how.
Can I get the 'liked' video list through the Javascript API?

Answer 1

If you're using v3 of the API, then you can get your liked video list. First, do a call to your channels feed, like this:
https://www.googleapis.com/youtube/v3/channels?part=contentDetails&mine=true&key={YOUR_API_KEY}
Then, in the response, you'll have a list of related playlists -- one will be keyed "likes." Take that playlist ID and request its items feed:
https://www.googleapis.com/youtube/v3/playlistItems?part=snippet&playlistId={PLAYLIST_ID}&key={YOUR_API_KEY}
If you don't use v3 of the API, you probably won't have a lot of success in getting the liked videos.

Answer 2

As of 2020, the /videos endpoint lets you filter directly for liked videos, e.g.:
GET https://www.googleapis.com/youtube/v3/videos?myRating=like&part=snippet
Authorization: Bearer <oauth token>

Answer 3

If you pass the following arguments to playlistItems.list, you can get the liked videos' playlist associated with the authorized acccount.
auth: "your_auth_key"
playlistId: "LL"
Here's a code snippet from the script I ran to get the liked videos in a text file.
Note: I used the helper code provided in the YouTube API Documentation to get the authkey and pass it to my function.
// get all the liked videos by a channel
async function get_liked_playlist(authkey){
fs.writeFile("./output/"+"all_liked_videos"+".txt", "\n"+time_stamp, { flag: 'a+' }, e => console.log(e) );
let nextPageToken_ = null;
let text__ = "";
let i = 0;
do {
await API.playlistItems.list({
key: process.env.API_KEY,
auth: authkey,
part: "snippet",
maxResults: 50, // 50 is the max value
playlistId: "LL",
pageToken: nextPageToken_
})
.then(res => {
let results = res.data.items;
nextPageToken_ = res.data.nextPageToken;
results.forEach(item => {
// console.log(`Title: ${item.snippet.title}\tURL: https://youtu.be/${item.snippet.resourceId.videoId}`)
i++;
text__ += "\nTitle: "+item.snippet.title+"\tURL: https://youtu.be/"+item.snippet.resourceId.videoId;
});
console.log("items done: "+i+"\tnextPageToken: "+nextPageToken_);
})
.then( fs.writeFile("./output/"+"all_liked_videos"+".txt", text__ , { flag: 'a+' }, e => { if(e) console.log("error with fs\t"+e); }) )
.then( text__ = "" )
.catch( e => console.log("error here\t" + e) )
} while (nextPageToken_ != null)
if(text__.length>1) fs.writeFile("./output/"+"all_liked_videos"+".txt", text__ , { flag: 'a+' }, e => { if(e) console.log("error with fs\t"+e); });
}