Well some parts of the communication seem to be in http.
After starting scraping one epsiode, a total of 2 HTTP requests are sent and 2 are received.
One pair goes to to wikimedia, the other one goes to thetvdb.com to receive the image.
The other parts are indeed encrypted
Edit:
I've used the logging function of MC. I've cleared the log directly before initiating the scraping.
0009969: 5576: Reader: CWinINetReader::Open: Start
0009969: 5576: Reader: CWinINetReader::Open: Opening http://thetvdb.com/banners/episodes/121361/6185708.jpg
0009969: 8664: Reader: CWinINetReader::Thread: Start
0009969: 8664: Reader: CWinINetReader::Thread: url: http://thetvdb.com/banners/episodes/121361/6185708.jpg
0009969: 8664: Reader: CWinINetReader::Connect: Start
0009969: 8664: Reader: CWinINetReader::Connect: Finish (0 ms)
0009969: 8664: Reader: CWinINetReader::DownloadFromHTTPURL: Start
0009969: 8664: Reader: CWinINetReader::DownloadFromHTTPURL: HttpOpenRequest successful
0010016: 8664: Reader: CWinINetReader::DownloadFromHTTPURL: HttpSendRequest successful
0010016: 8664: Reader: CWinINetReader::DownloadFromHTTPURL: Retry needed, trying again...
0010016: 8664: Reader: CWinINetReader::Connect: Start
0010016: 8664: Reader: CWinINetReader::Connect: Finish (0 ms)
0010016: 8664: Reader: CWinINetReader::DownloadFromHTTPURL: HttpOpenRequest successful
0010078: 8664: Reader: CWinINetReader::DownloadFromHTTPURL: HttpSendRequest error: 0
0010078: 8664: Reader: CWinINetReader::DownloadFromHTTPURL: Failed (header status code: -1)
0010078: 8664: Reader: CWinINetReader::DownloadFromHTTPURL: Finish (109 ms)
0010078: 8664: Reader: CWinINetReader::Thread: Finish (109 ms)
0010078: 5576: Reader: CWinINetReader::Open: ConnectToURL failed, m_bConnectError=true, URL=https://www.thetvdb.com/banners/episodes/121361/6185708.jpg
0010078: 5576: Reader: CWinINetReader::Close: Start
0010078: 5576: Reader: CWinINetReader::Close: Finish (0 ms)
0010078: 5576: Reader: CWinINetReader::Open: Finish (109 ms)
I've attached the full log. Requesting the episode information works flawlessly. Requesting the cover art image through Firefox works.