diff --git a/src/adapters/class-jw-player.php b/src/adapters/class-jw-player.php
index 219718c..56e55a5 100644
--- a/src/adapters/class-jw-player.php
+++ b/src/adapters/class-jw-player.php
@@ -12,7 +12,6 @@
 use Alley\WP\WP_Video_Sync\Interfaces\Adapter;
 use Alley\WP\WP_Video_Sync\Last_Modified_Date;
 use DateTimeImmutable;
-use stdClass;
 
 /**
  * JW Player Adapter.
@@ -41,7 +40,7 @@ public function __construct( JW_Player_API $api ) {
 	 * @param DateTimeImmutable $updated_after Return videos modified after this date.
 	 * @param int               $batch_size    The number of videos to fetch in each batch.
 	 *
-	 * @return stdClass[] An array of video data.
+	 * @return array<mixed> An array of video data objects.
 	 */
 	public function get_videos( DateTimeImmutable $updated_after, int $batch_size ): array {
 		// Set the request URL based on the arguments.
@@ -58,9 +57,14 @@ public function get_videos( DateTimeImmutable $updated_after, int $batch_size ):
 			return [];
 		}
 
+		// Validate the media property.
+		if ( ! is_array( $videos['media'] ) ) {
+			return [];
+		}
+
 		// Attempt to set the last modified date.
 		if (
-			! empty( $videos['media'] )
+			! empty( $videos['media'][ count( $videos['media'] ) - 1 ] )
 			&& isset( $videos['media'][ count( $videos['media'] ) - 1 ]->last_modified )
 		) {
 			$this->set_last_modified_date( $videos['media'][ count( $videos ) - 1 ]->last_modified );
diff --git a/src/api/class-jw-player-api.php b/src/api/class-jw-player-api.php
index aa03512..0697e3a 100644
--- a/src/api/class-jw-player-api.php
+++ b/src/api/class-jw-player-api.php
@@ -59,7 +59,7 @@ public function __construct( string $api_key, string $api_secret ) {
 	 * @param string $last_modified_date The date of the last modification to the last batch of videos.
 	 * @param int    $batch_size         The number of videos to fetch in each batch.
 	 */
-	public function set_request_url( string $last_modified_date, int $batch_size ) {
+	public function set_request_url( string $last_modified_date, int $batch_size ): void {
 		$request_url = $this->api_url . '/' . $this->api_key . '/media/';
 
 		$this->request_url = add_query_arg(
@@ -85,7 +85,7 @@ public function get_request_url(): string {
 	/**
 	 * Get the request arguments.
 	 *
-	 * @return array
+	 * @return array<string, array<string, string>>
 	 */
 	public function get_request_args(): array {
 		return [
@@ -99,12 +99,14 @@ public function get_request_args(): array {
 	/**
 	 * Parse the API error response.
 	 *
-	 * @param array $response_object The API response object.
+	 * @param array<mixed> $response_object The API response object.
 	 *
-	 * @return array
+	 * @return array<string, string>
 	 */
 	public function parse_error( array $response_object ): array {
-		return isset( $response_object['errors'][0]->description )
+		return ! empty( $response_object['errors'] )
+			&& is_array($response_object['errors'] )
+			&& isset( $response_object['errors'][0]->description )
 			? [ 'error' => $response_object['errors'][0]->description ]
 			: [];
 	}
@@ -112,12 +114,13 @@ public function parse_error( array $response_object ): array {
 	/**
 	 * Parse the API successful response.
 	 *
-	 * @param array $response_object The API response object.
+	 * @param array<mixed> $response_object The API response object.
 	 *
-	 * @return array
+	 * @return array<string, mixed>
 	 */
 	public function parse_success( array $response_object ): array {
-		return is_array( $response_object['media'] ) && ! empty( $response_object['media'] )
+		return ! empty( $response_object['media'] )
+			&& is_array( $response_object['media'] )
 			? [ 'media' => $response_object['media'] ]
 			: [];
 	}
diff --git a/src/api/class-request.php b/src/api/class-request.php
index ba2fadc..92c1433 100644
--- a/src/api/class-request.php
+++ b/src/api/class-request.php
@@ -44,7 +44,7 @@ public function user_agent(): string {
 	/**
 	 * Get the request arguments.
 	 *
-	 * @return array
+	 * @return array<string, mixed>
 	 */
 	public function get_request_args(): array {
 		$requester_args = $this->api_requester->get_request_args();
@@ -53,6 +53,11 @@ public function get_request_args(): array {
 			$requester_args['user-agent'] = $this->user_agent();
 		}
 
+		/**
+		 * Allow the request arguments to be filtered before the request is made.
+		 *
+		 * @param array<string, string|float|int|bool|array> $requester_args The request arguments.
+		 */
 		return apply_filters( 'wp_video_sync_request_args', $requester_args );
 	}
 
@@ -60,11 +65,12 @@ public function get_request_args(): array {
 	 * Parse the API response.
 	 *
 	 * @param mixed $response The API response.
-	 * @return array
+	 *
+	 * @return array<string, mixed>
 	 */
 	private function parse_response( mixed $response ): array {
 		// Failed request expressed as a WP_Error.
-		if ( is_wp_error( $response ) || empty( $response ) ) {
+		if ( is_wp_error( $response ) || empty( $response ) || ! is_array( $response ) ) {
 			return [];
 		}
 
@@ -87,7 +93,7 @@ private function parse_response( mixed $response ): array {
 	/**
 	 * Perform a GET request.
 	 *
-	 * @return array
+	 * @return array<string, mixed>
 	 */
 	public function get(): array {
 		if ( function_exists( 'vip_safe_wp_remote_get' ) ) {
diff --git a/src/interfaces/adapter.php b/src/interfaces/adapter.php
index 18ffeb4..2039b5c 100644
--- a/src/interfaces/adapter.php
+++ b/src/interfaces/adapter.php
@@ -8,7 +8,6 @@
 namespace Alley\WP\WP_Video_Sync\Interfaces;
 
 use DateTimeImmutable;
-use stdClass;
 
 /**
  * Defines an interface that all adapters must implement.
@@ -21,7 +20,7 @@ interface Adapter {
 	 * @param DateTimeImmutable $updated_after Return videos modified after this date.
 	 * @param int               $batch_size    The number of videos to fetch in each batch.
 	 *
-	 * @return stdClass[] An array of video data. Specific shape will be determined by the adapter.
+	 * @return array<mixed> An array of video data. Specific shape will be determined by the adapter.
 	 */
 	public function get_videos( DateTimeImmutable $updated_after, int $batch_size ): array;
 }
diff --git a/src/interfaces/api-requester.php b/src/interfaces/api-requester.php
index a08635a..22ff701 100644
--- a/src/interfaces/api-requester.php
+++ b/src/interfaces/api-requester.php
@@ -23,23 +23,26 @@ public function get_request_url(): string;
 	/**
 	 * Get the arguments for the API request.
 	 *
-	 * @return array
+	 * @return array<string, array<string, string>>
 	 */
 	public function get_request_args(): array;
 
 	/**
-	 * Parse a successful API response.
+	 * Parse an error API response.
+	 *
+	 * @param array<mixed> $response_object The API response object.
 	 *
-	 * @param array $response_object The response object.
-	 * @return array
+	 * @return array<string, string>
 	 */
-	public function parse_success( array $response_object ): array;
+	public function parse_error( array $response_object ): array;
 
 	/**
-	 * Parse an error API response.
+	 * Parse a successful API response.
+	 *
+	 * @param array<mixed> $response_object The API response object.
 	 *
-	 * @param array $response_object The response object.
-	 * @return array
+	 * @return array<string, mixed>
 	 */
-	public function parse_error( array $response_object ): array;
+	public function parse_success( array $response_object ): array;
+
 }