gnu: yt-dlp: Use new package style.

* gnu/packages/video.scm (yt-dlp)[source](snippet): Rewrite as a G-Expression.
[arguments]: Use G-Expressions.
[inputs]: Drop labels.
[native-inputs]: Likewise.

Signed-off-by: Liliana Marie Prikler <liliana.prikler@gmail.com>

gnu/packages/video.scm

@@ -2484,10 +2484,11 @@ (define-public yt-dlp
                (base32
                 "1wmzfqhysx1mqdba4ikvm6nbahasihi4xgqwqad20y3vs701slyj"))
               (snippet
-               '(begin
+               #~(begin
                    ;; Delete the pre-generated files, except for the man page
                    ;; which requires 'pandoc' to build.
-                  (for-each delete-file '("yt-dlp"
+                   (for-each delete-file
+                             (list "yt-dlp"
                                    ;;pandoc is needed to generate
                                    ;;"yt-dlp.1"
                                    "completions/bash/yt-dlp"
@@ -2497,7 +2498,7 @@ (define-public yt-dlp
      (substitute-keyword-arguments (package-arguments youtube-dl)
        ((#:tests? _) #t)
        ((#:phases phases)
-        `(modify-phases ,phases
+        #~(modify-phases #$phases
             ;; See the comment for the corresponding phase in youtube-dl.
             (replace 'default-to-the-ffmpeg-input
               (lambda _
@@ -2521,16 +2522,14 @@ (define-public yt-dlp
               (lambda* (#:key tests? #:allow-other-keys)
                 (when tests?
                   (invoke "pytest" "-k" "not download"))))))))
-    (inputs
-     `(("python-brotli" ,python-brotli)
-       ("python-certifi" ,python-certifi)
-       ("python-mutagen" ,python-mutagen)
-       ("python-pycryptodomex" ,python-pycryptodomex)
-       ("python-websockets" ,python-websockets)
-       ,@(package-inputs youtube-dl)))
-    (native-inputs
-     `(("python-pytest" ,python-pytest)
-       ,@(package-native-inputs youtube-dl)))
+    (inputs (modify-inputs (package-inputs youtube-dl)
+              (append python-brotli
+                      python-certifi
+                      python-mutagen
+                      python-pycryptodomex
+                      python-websockets)))
+    (native-inputs (modify-inputs (package-native-inputs youtube-dl)
+                     (append python-pytest)))
     (description
      "yt-dlp is a small command-line program to download videos from
 YouTube.com and many more sites.  It is a fork of youtube-dl with a