YouTube/Vimeo API - MP4 files

Question

I think YouTube or Vimeo does not have (even paid) any longer API, that will allow me streaming with use of the progressive download the video files (MP4, MPEG-TS or even FL

Answer 1

On Vimeo, PRO users have direct access to all of their video file links through the New API.

This includes any formats they generate (hd, sd, etc) and an hls stream.