I need to know the equivalent request in YouTube Data API v3 as this v2 request for retrieving all the new subscription videos.
https://gdata.youtube.com/feeds/api/users/default/newsubscriptionvideos
I have not seen any simple and clean requests that are as simple as the v2 version of the reques
You can retrieve this information with the Youtube V3 API but it is incredibly inefficient:
You can now sort the videos by publishing date and print the most recent.
If you have 100 subscriptions and fetch 5 videos from each channel this will result in 114 API requests and use around 500 quota units (the daily limit is 50 million units). It will also take about 2 minutes to run if you don't parallelize the API calls.
This method does have a couple of benefits over using activites though:
A full Python implementation is available: https://github.com/ali1234/ytsubs