The string typically refers to a file name for a specific episode of a show—most likely the 100th episode of a long-running series—hosted on the (now defunct) file-sharing site Openload.
I can write a short essay or "think piece" about the era of internet file-sharing, the legacy of sites like Openload, and the culture of digital archiving. E100.1080P.mp4 | openload
I can explain what the different parts of that filename mean (resolution, file format, and hosting platform). The string typically refers to a file name