diff --git a/src/Innertube.ts b/src/Innertube.ts
index 48110d9d6..d594c3b3c 100644
--- a/src/Innertube.ts
+++ b/src/Innertube.ts
@@ -52,6 +52,11 @@ import { Hashtag, SearchFilter, ReelSequence, GetCommentsSectionParams } from '.
 
 /**
  * Provides access to various services and modules in the YouTube API.
+ * 
+ * @example
+ * ```ts
+ * import { Innertube, UniversalCache } from 'youtubei.js';
+ * const innertube = await Innertube.create({ cache: new UniversalCache(true)});
  */
 export default class Innertube {
   #session: Session;
@@ -427,7 +432,6 @@ export default class Innertube {
 
   /**
    * Resolves the given URL.
-   * @param url - The URL.
    */
   async resolveURL(url: string): Promise<NavigationEndpoint> {
     const response = await this.actions.execute(
@@ -442,8 +446,6 @@ export default class Innertube {
 
   /**
    * Utility method to call an endpoint without having to use {@link Actions}.
-   * @param endpoint -The endpoint to call.
-   * @param args - Call arguments.
    */
   call<T extends IParsedResponse>(endpoint: NavigationEndpoint, args: { [key: string]: any; parse: true }): Promise<T>;
   call(endpoint: NavigationEndpoint, args?: { [key: string]: any; parse?: false }): Promise<ApiResponse>;
diff --git a/src/core/Player.ts b/src/core/Player.ts
index 4c5fd43c8..e9a7e924c 100644
--- a/src/core/Player.ts
+++ b/src/core/Player.ts
@@ -25,8 +25,8 @@ export default class Player {
     const url = new URL('/iframe_api', Constants.URLS.YT_BASE);
     const res = await fetch(url);
 
-    if (res.status !== 200)
-      throw new PlayerError('Failed to request player id');
+    if (!res.ok)
+      throw new PlayerError(`Failed to get player id: ${res.status} (${res.statusText})`);
 
     const js = await res.text();
 
@@ -121,7 +121,7 @@ export default class Player {
           throw new PlayerError('Failed to decipher nsig');
 
         if (nsig.startsWith('enhanced_except_')) {
-          Log.warn(TAG, 'Could not transform nsig, download may be throttled.');
+          Log.warn(TAG, 'Something went wrong while deciphering nsig.');
         } else if (this_response_nsig_cache) {
           this_response_nsig_cache.set(n, nsig);
         }
@@ -146,6 +146,9 @@ export default class Player {
       case 'WEB_KIDS':
         url_components.searchParams.set('cver', Constants.CLIENTS.WEB_KIDS.VERSION);
         break;
+      case 'TVHTML5':
+        url_components.searchParams.set('cver', Constants.CLIENTS.TV.VERSION);
+        break;
       case 'TVHTML5_SIMPLY_EMBEDDED_PLAYER':
         url_components.searchParams.set('cver', Constants.CLIENTS.TV_EMBEDDED.VERSION);
         break;
@@ -242,4 +245,4 @@ export default class Player {
   static get LIBRARY_VERSION(): number {
     return 11;
   }
-}
+}
\ No newline at end of file
diff --git a/src/parser/classes/misc/Format.ts b/src/parser/classes/misc/Format.ts
index 9bdbe2a8d..4254b7f8b 100644
--- a/src/parser/classes/misc/Format.ts
+++ b/src/parser/classes/misc/Format.ts
@@ -1,7 +1,35 @@
 import type Player from '../../../core/Player.js';
-import { InnertubeError } from '../../../utils/Utils.js';
 import type { RawNode } from '../../index.js';
 
+export type ProjectionType = 'RECTANGULAR' | 'EQUIRECTANGULAR' | 'EQUIRECTANGULAR_THREED_TOP_BOTTOM' | 'MESH';
+export type SpatialAudioType = 'AMBISONICS_5_1' | 'AMBISONICS_QUAD' | 'FOA_WITH_NON_DIEGETIC';
+export type StereoLayout = 'LEFT_RIGHT' | 'TOP_BOTTOM';
+
+export type Range = {
+  start: number;
+  end: number;
+};
+
+export type ColorInfo = {
+  primaries?: string;
+  transfer_characteristics?: string;
+  matrix_coefficients?: string;
+};
+
+export type AudioTrack = {
+  audio_is_default: boolean;
+  display_name: string;
+  id: string;
+};
+
+export type CaptionTrack = {
+  display_name: string;
+  vss_id: string;
+  language_code: string;
+  kind?: 'asr' | 'frc';
+  id: string;
+};
+
 export default class Format {
   #this_response_nsig_cache?: Map<string, string>;
 
@@ -17,13 +45,13 @@ export default class Format {
   drm_families?: string[];
   fps?: number;
   quality_label?: string;
-  projection_type?: 'RECTANGULAR' | 'EQUIRECTANGULAR' | 'EQUIRECTANGULAR_THREED_TOP_BOTTOM' | 'MESH';
+  projection_type?: ProjectionType;
   average_bitrate?: number;
   bitrate: number;
-  spatial_audio_type?: 'AMBISONICS_5_1' | 'AMBISONICS_QUAD' | 'FOA_WITH_NON_DIEGETIC';
+  spatial_audio_type?: SpatialAudioType;
   target_duration_dec?: number;
   fair_play_key_uri?: string;
-  stereo_layout?: 'LEFT_RIGHT' | 'TOP_BOTTOM';
+  stereo_layout?: StereoLayout;
   max_dvr_duration_sec?: number;
   high_replication?: boolean;
   audio_quality?: string;
@@ -38,20 +66,10 @@ export default class Format {
   track_absolute_loudness_lkfs?: number;
   mime_type: string;
   is_type_otf: boolean;
-  init_range?: {
-    start: number;
-    end: number;
-  };
-  index_range?: {
-    start: number;
-    end: number;
-  };
+  init_range?: Range;
+  index_range?: Range;
   cipher?: string;
-  audio_track?: {
-    audio_is_default: boolean;
-    display_name: string;
-    id: string;
-  };
+  audio_track?: AudioTrack;
   has_audio: boolean;
   has_video: boolean;
   has_text: boolean;
@@ -60,23 +78,12 @@ export default class Format {
   is_descriptive?: boolean;
   is_secondary?: boolean;
   is_original?: boolean;
-  color_info?: {
-    primaries?: string;
-    transfer_characteristics?: string;
-    matrix_coefficients?: string;
-  };
-  caption_track?: {
-    display_name: string;
-    vss_id: string;
-    language_code: string;
-    kind?: 'asr' | 'frc';
-    id: string;
-  };
+  color_info?: ColorInfo;
+  caption_track?: CaptionTrack;
 
   constructor(data: RawNode, this_response_nsig_cache?: Map<string, string>) {
-    if (this_response_nsig_cache) {
+    if (this_response_nsig_cache)
       this.#this_response_nsig_cache = this_response_nsig_cache;
-    }
 
     this.itag = data.itag;
     this.mime_type = data.mimeType;
@@ -228,11 +235,13 @@ export default class Format {
   }
 
   /**
-   * Deciphers the streaming url of the format.
-   * @returns Deciphered URL.
+   * Deciphers the URL using the provided player instance.
+   * @param player - An optional instance of the Player class used to decipher the URL.
+   * @returns The deciphered URL as a string. If no player is provided, returns the original URL or an empty string.
    */
-  decipher(player: Player | undefined): string {
-    if (!player) throw new InnertubeError('Cannot decipher format, this session appears to have no valid player.');
+  decipher(player?: Player): string {
+    if (!player)
+      return this.url || '';
     return player.decipher(this.url, this.signature_cipher, this.cipher, this.#this_response_nsig_cache);
   }
 }
\ No newline at end of file
diff --git a/src/utils/Utils.ts b/src/utils/Utils.ts
index 9aceda39e..51136f4cf 100644
--- a/src/utils/Utils.ts
+++ b/src/utils/Utils.ts
@@ -7,6 +7,7 @@ import { Jinter } from 'jintr';
 import type { EmojiRun, TextRun } from '../parser/misc.js';
 import type { FetchFunction } from '../types/PlatformShim.js';
 import type PlatformShim from '../types/PlatformShim.js';
+import type { Node } from 'estree';
 
 const TAG_ = 'Utils';
 
@@ -289,7 +290,7 @@ export function findFunction(source: string, args: FindFunctionArgs): FindFuncti
   const { name, includes, regexp } = args;
 
   const node = Jinter.parseScript(source);
-  const stack = [ node ];
+  const stack = [ node ] as (Node & { start: number; end: number})[];
 
   for (let i = 0; i < stack.length; i++) {
     const current = stack[i];
@@ -319,7 +320,7 @@ export function findFunction(source: string, args: FindFunctionArgs): FindFuncti
     }
 
     for (const key in current) {
-      const child = current[key];
+      const child = (current as Record<string, any>)[key];
       if (Array.isArray(child)) {
         stack.push(...child);
       } else if (typeof child === 'object' && child !== null) {