Rockstar Games has temporarily disabled YouTube uploads for the Rockstar Editor feature in its newly released GTA 5 Enhanced edition on PC. According to Tez2, a reputable Rockstar insider and data miner, this change was made some time ago.
The Rockstar Editor allows players to record, edit, and share footage from GTA 5’s story mode and multiplayer (GTA Online). However, due to a reported bug or issue, the tool is currently unavailable for YouTube uploads in the Enhanced edition. The reason behind this decision remains unknown, but it may be addressed with an official statement or patch notes.
Other issues have been reported by players, including problems with account migration and the absence of GTA Online Text Chat support in the Enhanced edition on PC. As the new port is still relatively recent, these concerns suggest that Rockstar is working to resolve them.
Source: https://www.sportskeeda.com/gta/news-rockstar-reportedly-disabled-feature-gta-5-enhanced-for-some-time