Problem getting the most recent uploaded videos of a channel using the YouTube Data API V3

Question

I am using the Google APIS explorer's youtube.playlistItems.list. I've set the part parameter to "snippet", the maxResults to 10, the playlistId to UUzoVCacndDCfGDf41P-z0iA which is the uploads id for the JSConf YouTube channel (the channelId is UCzoVCacndDCfGDf41P-z0iA), but for some reason I don't see some of the recent videos uploaded on the channel. I assume maybe because the videos are not returned in a particular order?... if so, how can I can make sure that I get the most recent uploaded videos that corresponds to a specific maxResults value that I specify?

Update: the API works just fine with other channels & the videos are even returned in order which is what I would expect...

Answer 1

Please note the fact that the PlaylistItems endpoint queried for the uploads list of a channel produces an items list which is ordered by videoPublishedAt. But the items themselves contains publishedAt datetime properties attached.

videos#snippet.publishedAt (datetime)

The date and time that the video was published. Note that this time might be different than the time that the video was uploaded. For example, if a video is uploaded as a private video and then made public at a later time, this property will specify the time that the video was made public.

Then the output obtained is fact correct:

$ youtube-data \
--playlist=UUzoVCacndDCfGDf41P-z0iA --videos \
--max-results=20 --page=- \
--table --relative-date
09V_JAGTs2E   2   days 14  hours ago    What Tamagotchis Can Teach You About...
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If you want to obtain the latest published say 10 videos of a particular channel you should query the Search endpoint instead, passing to it proper parameters: channelId=..., maxResults=10 and order=date.

The output then would look like the one below:

$ youtube-data \
--channel=UCzoVCacndDCfGDf41P-z0iA --videos \
--max-results=10 --page=- \
--table
_0ij8vY2gzE  2019-06-27T02:44:21.000Z  Music and Art with ML by Monica Dincu...
Vk9bPDaZELQ  2019-06-26T12:10:11.000Z  Block, unblock, block! How ad blocker...
ZMZMMuXRFcE  2019-06-26T02:14:07.000Z  Web Components and the AOM by Léonie ...
GhRE3rML9t4  2019-06-25T14:14:55.000Z  CSS Houdini & The Future of Styling b...
JybbgAz3meQ  2019-06-24T22:54:47.000Z  How to Calculate the Phase of the Moo...
UM-RhglTyKA  2019-06-24T22:54:47.000Z  GraphQL, the Domain Way - Thais Corre...
g3jwd0kAIDU  2019-06-24T22:54:47.000Z  Improving React Native Performance in...
I4ugdJRCj9Q  2019-06-24T22:54:47.000Z  Building Up the Electron Project: Tea...
el9fhSbby5E  2019-06-24T22:54:46.000Z  JavaScript is AsynchroWAT? - Crystal ...
NdKAUXAvt8E  2019-06-24T22:54:46.000Z  The Teenage Mutant Ninja Turtle Guide...