diff --git a/2webm.lua b/2webm.lua
index abc2f5f..6cb7f67 100644
--- a/2webm.lua
+++ b/2webm.lua
@@ -2,12 +2,13 @@
 
 local helptext = [[Usage:
 
-  2webm.lua [threads]
+  2webm.lua [threads=1]
 
 Converts everything in the local directory to webm, placed in "./2webm-output".
+(Defaults to using only a single thread to reduce impact on the system.)
 
 [threads]: Number of threads ffmpeg will be assigned.
-           If a non-number value, 1 thread will be used.
+           If a non-number value, ffmpeg's -threads flag will not be used.
 ]]
 
 if arg[1] and arg[1]:find("help") then
@@ -18,14 +19,14 @@ end
 local error_occurred, utility = pcall(function() return require("utility-functions") end) if not error_occurred then error("This script is installed improperly. Follow instructions at https://github.com/TangentFoxy/.lua-files#installation") end
 utility.required_program("ffpmeg")
 
-local threads = tonumber(arg[1]) or (arg[1] and 1)
+local threads = tonumber(arg[1]) or arg[1] or 1
 
 local for_files = utility.ls()
 os.execute("mkdir 2webm-output")
 
 for_files(function(file_name)
   local command
-  if threads then
+  if type(threads) == "number" then
     command = "ffmpeg -threads " .. threads .. " -i \"" .. file_name .. "\" -threads " .. threads .. " \"2webm-output/" .. file_name .. ".webm\""
   else
     command = "ffmpeg -i \"" .. file_name .. "\" \"2webm-output/" .. file_name .. ".webm\""
diff --git a/test.lua b/test.lua
index 3598e82..8623560 100644
--- a/test.lua
+++ b/test.lua
@@ -6,7 +6,7 @@ utility = require("utility-functions")
 
 print("---")
 
-local threads = tonumber(arg[1]) or (arg[1] and 1)
-print(threads)
+local threads = tonumber(arg[1]) or arg[1] or 1
+print(threads, type(threads))
 
 print("---")