diff --git a/.config/fish/functions/remux.fish b/.config/fish/functions/remux.fish
new file mode 100644
index 0000000..35874be
--- /dev/null
+++ b/.config/fish/functions/remux.fish
@@ -0,0 +1,22 @@
+function remux --wraps=ffmpeg --description 'remux to mp4'
+    mkdir -p /tmp/remux
+
+    # download file if input path is a url
+    if string match -qr '^(https?://|youtu\.?be|[a-zA-Z0-9]{11}$)' $argv[1]
+        set argv[1] (yt-dlp -q --force-overwrites --print after_move:filepath \
+        -f 'bestvideo[height<=?1080][vcodec!=?av01]+bestaudio/best' \
+        -o "/tmp/remux/download.%(ext)s" $argv[1])
+        or return
+    end
+
+    # set output path to default one if not set
+    set noask
+    if not set -q argv[2]
+        set noask -y
+        set argv[2] /tmp/remux/out.mp4
+    end
+
+    ffmpeg $noask -i $argv[1] -c copy -movflags faststart $argv[2..]
+
+    command -sq wl-copy; and wl-copy -t text/uri-list "file://$(realpath $argv[-1])"
+end