YouTube has some fairly specific requirements that third-party clients must adhere to [1]. According to my recollection and Google's own revision history [2], t

YouTube has some fairly specific requirements that third-party clients must adhere to [1]. According to my recollection and Google's own revision history [2], this general form of the document dates to August 2016, since at the time I submitted it to HN [3], although no discussion ensued. In that update, they reformulated their Terms of Service and instead published a series of documents focusing on various topics that third-party developers must uphold to be able to serve as a YouTube client. This means that, as an easy example, clients which omit Google's ads [5] are running afoul of these policies. That being said, as with most ToS, YouTube reserves the right to terminate access to its API Services at any time [4]. [1] https://developers.google.com/youtube/terms/required-minimum-functionality https://developers.google.com/youtube/terms/required-minimum... [2] https://developers.google.com/youtube/terms/revision-history https://developers.google.com/youtube/terms/revision-history [3] https://news.ycombinator.com/item?id=12409825 https://news.ycombinator.com/item?id=12409825 [4] https://developers.google.com/youtube/terms/api-services-terms-of-service#termination https://developers.google.com/youtube/terms/api-services-ter... [5] https://developers.google.com/youtube/terms/developer-policies#i-additional-prohibitions https://developers.google.com/youtube/terms/developer-polici...