fix: improve downloads (prefer yt-dlp), flexible deps, and update msg

ani-cli

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-version_number="4.10.6"
+version_number="4.10.7"
 
 # UI
 
@@ -299,8 +299,9 @@ download() {
             # [ -e "$download_dir/$2.vtt" ] && ffmpeg -i "$download_dir/$2.mp4" -i "$download_dir/$2.vtt" -c copy -c:s mov_text "$download_dir/$2.bak.mp4" && mv "$download_dir/$2.bak.mp4" "$download_dir/$2.mp4"
             ;;
         *)
+            command -v "yt-dlp" >/dev/null && yt-dlp --referer "$allanime_refr" -o "$download_dir/$2.mp4" "$1"
             # shellcheck disable=SC2086
-            aria2c --referer="$allanime_refr" --enable-rpc=false --check-certificate=false --continue $iSH_DownFix --summary-interval=0 -x 16 -s 16 "$1" --dir="$download_dir" -o "$2.mp4" --download-result=hide
+            command -v "yt-dlp" >/dev/null || aria2c --referer="$allanime_refr" --enable-rpc=false --check-certificate=false --continue $iSH_DownFix --summary-interval=0 -x 16 -s 16 "$1" --dir="$download_dir" -o "$2.mp4" --download-result=hide
             ;;
     esac
 }
@@ -494,7 +495,9 @@ dep_ch "curl" "sed" "grep" || true
 dep_ch "fzf" || true
 case "$player_function" in
     debug) ;;
-    download) dep_ch "ffmpeg" "aria2c" ;;
+    download)
+        command -v "yt-dlp" >/dev/null || echo "ffmpeg" "aria2c" | xargs -n1 command -v >/dev/null || die "Neither yt-dlp nor ffmpeg and aria2c found. Please install one."
+        ;;
     android*) printf "\33[2K\rChecking of players on Android is disabled\n" ;;
     *iSH*) printf "\33[2K\rChecking of players on iOS is disabled\n" ;;
     flatpak_mpv) true ;; # handled out of band in where_mpv