What is the maximum size/length of IDs, especially for comment IDs - youtube-api

Question

I'm trying to find the maximum size of the different IDs of the YouTube API.
Can someone tell me where can I found this or what is the maximum number of characters of:
- Comments IDs
- Channels IDs
- Playlists IDs
- Subscriptions IDs
Thank you!
Dan

Answer 1

You can get the Comments ID from the JSON response in the Resource representation ("id": string) section of the documentation.
See the JSON structure of a comments resource
{
"kind": "youtube#comment",
"etag": etag,
"id": string,
"snippet": {
"authorDisplayName": string,
"authorProfileImageUrl": string,
"authorChannelUrl": string,
"authorChannelId": {
"value": string
},
"channelId": string,
"videoId": string,
"textDisplay": string,
"textOriginal": string,
"parentId": string,
"canRate": boolean,
"viewerRating": string,
"likeCount": unsigned integer,
"moderationStatus": string,
"publishedAt": datetime,
"updatedAt": datetime
}
}
Same with Channels ID, Playlist ID, Subscription ID.
Unfortunately, coming from the YouTube developer that they do not guarantee about the length of each specific ID.
Here is a StackExchange post as a reference.
It was mentioned that the word is coming from a YouTube developer, here is the link from Google Groups Forum to justify.
Hello Hans,
I don't see anywhere in the documentation where we officially commit
to a standard length of 11 characters for YouTube video ids. It's one
of those things where we have a current implementation, and it may
stay that way indefinitely. But we're not offering any official
commitment to that, so proceed at your own risk.
A better approach, though one that's more involved, would be to take
each video id and make a request to the YouTube API to see if it's
valid. E.g., make an HTTP GET to
http://gdata.youtube.com/feeds/api/videos/VIDEO_ID
and see if you get back a HTTP 200 response. Of course, if you take
that approach, videos that have been removed from YouTube will come
back as invalid (which may or may not be what you want) and videos
that have been very recently uploaded to YouTube might also come back
as invalid.
Cheers,
-Jeff Posnick, YouTube API Team