Is there a way to upload videos from sites not on the embeded list?

Is there a way to up load videos from sites not on their list. I tried using an image in a jpeg form but it wouldn't take it. I want to know who the brunette is in the thumbnail of this video https://txxx.com/videos/4859823/lesbian-trib-mix/?fr=11275804&rp=2. (20:18 min). Plz teach me how to uplaod stuff from other sites or images. Their guide is not clear