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
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.
In ASP or c# you can use below code, this will return you json string
string url = "https://api.vimeo.com/me/videos/" + videoId;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "GET";
request.Accept = "application/vnd.vimeo.*+json;version=3.0";
request.Headers.Add(HttpRequestHeader.Authorization, "Bearer YOUR_ACCESS_TOKEN");
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream resStream = response.GetResponseStream();
var reader = new StreamReader(resStream);
string jsonResponse = reader.ReadToEnd();
First of all, according to API 3 Link to video not showing Vimeo is now handling API support here with additional support via Email.
For a PRO account, here are the steps to accessing MP4 files for your videos on Vimeo using the new V3 API:
This will return a "files" key that includes multiple video sizes.
If you're not a PRO user or are attempting to access files uploaded by other users, this link seems to do the trick: http://player.vimeo.com/v2/video/VIDEO_ID/config. This only works if the video is downloadable.