scripts: Add custom ytdl options for vidl

Allow setting custom ytdl options for the vidl video downloader.
Can be set through $YT_DL_OPTS environment option.

scripts/.local/bin/vidl

@@ -5,6 +5,8 @@
 DL_FOLDER="${DL_FOLDER:-${XDG_VIDEOS_DIR:-$HOME/videos}}/inbox"
 ARCHIVE_FOLDER="${ARCHIVE_FOLDER:-${XDG_VIDEOS_DIR:-$HOME/videos}}/archive"
 YT_DL_CMD="${YT_DL_CMD:-yt-dlp}"
+yt_default_opts=(-f "best[height\<=1080]" --retries 15 --embed-subs --sub-lang "en,de,es,fr")
+declare -a YT_DL_OPTS=${YT_DL_OPTS:-( "${yt_default_opts[@]}" )}
 YT_DL_TITLE="""${YT_DL_TITLE:-%(channel)s_%(title)s_%(id)s}"""
 
 show_help() {
@@ -71,10 +73,8 @@ _findfile() {
 YT_DL_TITLE="%(channel)s_%(title)s_%(id)s"
 _download() {
     "$YT_DL_CMD" \
-        -f 'best[height<=1080]' \
         -o "$DL_FOLDER/$YT_DL_TITLE.%(ext)s" \
-        --write-sub --write-auto-sub --embed-subs --sub-lang en,de,es,fr \
-        --retries 15 \
+        "${YT_DL_OPTS[@]}" \
         "$url"
 }