Using the HttpClient and the OData service to download Mix videos

var httpClient = new HttpClient("http://api.visitmix.com/OData.svc");

string tagName = "REST";

var serviceDocument = httpClient.Get().Content.ReadAsDataContract<AtomPub10ServiceDocumentFormatter>().Document; ;

// Get Url for Tags collection
var tagsUrl = (from co in serviceDocument.Workspaces[0].Collections
               where co.Title.Text == "Tags"
               select new Uri(serviceDocument.BaseUri, co.Link)).FirstOrDefault();

var tagsDocument = httpClient.Get(tagsUrl).Content.ReadAsDataContract<Atom10FeedFormatter>().Feed;

// Find Sessions Link for tag
var sessionsUri = (from tg in tagsDocument.Items
           from lk in tg.Links
           where tg.Title.Text == tagName &&
                lk.RelationshipType == "http://schemas.microsoft.com/ado/2007/08/dataservices/related/Sessions"
          select new Uri(tagsDocument.BaseUri, lk.Uri)).First();

// Follow the link to get the list of sessions
var sessionsForTagFeed = httpClient.Get(sessionsUri).Content.ReadAsDataContract<Atom10FeedFormatter>().Feed; ;

// Get the files links for each session
var sessionFileLinks = (from st in sessionsForTagFeed.Items
              from lk in st.Links
              where lk.RelationshipType == "http://schemas.microsoft.com/ado/2007/08/dataservices/related/Files"
              select new Uri(sessionsForTagFeed.BaseUri,lk.Uri)
              );


// Loop through each list of files and download
foreach (Uri sessionFilesLink in sessionFileLinks) {

    var filesDocument = httpClient.Get(sessionFilesLink).Content.ReadAsDataContract<Atom10FeedFormatter>().Feed;

    var files = from it in filesDocument.Items
                let uri = it.GetMediaResourceUri()
                where it.Content.Type == "video/x-ms-wmv" && !uri.ToString().Contains("wmv-hq")
                select uri;

    foreach (Uri uri in files) {
        try {
            var response = httpClient.Get(uri);
            var filename = uri.Segments.Last();
            using (var file = new FileStream(filename, FileMode.CreateNew)) {
                response.Content.WriteTo(file);
                response.EnsureStatusIsSuccessful();
            }
        }
        catch (WebException ex) {
            Console.WriteLine("Failed to download " + uri.ToString() + " : " + ex.Message);
            // Continue onto next
        }

    }
}