How to use a pattern in Lua 5.1 or Neovim to match multiple file extensions?

I'm trying to use a regular expression in Lua to check if a file path ends with specific extensions

(e.g., .mp4, .mkv, .avi, .mov, .flv, .wmv).

I want to avoid using a for loop to check each extension individually and instead use a single regex pattern.

local myFile = "/test/file.mp4"
if myFile:lower():match("%.(mp4|mkv|avi|mov|flv|wmv)$") then
  print("match")
end

Expected Behavior

I expect the code to print match when myFile ends with .mp4, .mkv, .avi, .mov, .flv, or .wmv. For example, /test/file.mp4 should print match.

Actual Result

The code does not print match

Lua doesn't support regular expression, this is called pattern in lua, you should use the vim.regex API instead.

local myFile = "/test/file.mp4"
-- local regex = vim.regex('\\c\\.\\(mp4\\|mkv\\|avi\\|mov\\|flv\\|wmv\\)$')
local regex = vim.regex([[\c\.\(mp4\|mkv\|avi\|mov\|flv\|wmv\)$]]) -- same as above
if regex:match_str(myFile) then
  print("match")
end

The \\c flag in the pattern is used to ignore case.