-vegamovies.to-.vikings.valhalla.s03e04.the.end...

(you can adjust quality and codec as needed)

To strictly answer your request for a “proper piece” without the extraneous -Vegamovies.To-. prefix:

Based on common scene naming conventions, a for that episode would be:

If you want to keep it organized but remove the pirate group tag ( -Vegamovies.To- ), just use the standard:

It looks like you’re trying to correct or properly format a filename that appears to be from a pirate release group (Vegamovies) for Vikings: Valhalla Season 3, Episode 4.

(or .mp4, depending on the actual file)