This type of filename was common for TV episodes shared on torrent sites, Usenet, or IRC before the widespread adoption of MKV/H.264. Today, such files are considered low resolution (SD) by modern standards. They may also pose security risks if downloaded from unverified sources (malware can be disguised as video files).
Today, we stream Prison Break in 4K on platforms like Hulu or Disney+ with a single click. The "prisonbreaks04e03hdtvxvidlol" era is largely over, replaced by 10-bit HEVC encodes and MKV containers.
: The file extension for the Audio Video Interleave container.