diff --git a/src/Mooc/Courses/Application/Find/CoursesFinder.php b/src/Mooc/Courses/Application/Find/CoursesFinder.php
new file mode 100644
index 000000000..1e8b6a70a
--- /dev/null
+++ b/src/Mooc/Courses/Application/Find/CoursesFinder.php
@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace CodelyTv\Mooc\Courses\Application\Find;
+
+use CodelyTv\Mooc\Courses\Domain\CourseRepository;
+use CodelyTv\Mooc\Courses\Domain\CoursesFinder as DomainCoursesFinder;
+
+final class CoursesFinder
+{
+    /** @var DomainCoursesFinder */
+    private $finder;
+
+    public function __construct(CourseRepository $repository)
+    {
+        $this->finder = new DomainCoursesFinder($repository);
+    }
+
+    public function __invoke(): array
+    {
+        return $this->finder->__invoke();
+    }
+}
diff --git a/src/Mooc/Courses/Application/Find/CoursesResponse.php b/src/Mooc/Courses/Application/Find/CoursesResponse.php
new file mode 100644
index 000000000..8c90d529b
--- /dev/null
+++ b/src/Mooc/Courses/Application/Find/CoursesResponse.php
@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace CodelyTv\Mooc\Courses\Application\Find;
+
+use CodelyTv\Shared\Domain\Bus\Query\Response;
+
+final class CoursesResponse implements Response
+{
+    /** @var array */
+    private $courses;
+
+    /**
+     * CoursesResponse constructor
+     */
+    public function __construct(array $courses)
+    {
+        $this->courses = $courses;
+    }
+
+    public function courses(): array
+    {
+        return $this->courses;
+    }
+}
diff --git a/src/Mooc/Courses/Application/Find/CoursesResponseConverter.php b/src/Mooc/Courses/Application/Find/CoursesResponseConverter.php
new file mode 100644
index 000000000..723aab7a8
--- /dev/null
+++ b/src/Mooc/Courses/Application/Find/CoursesResponseConverter.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace CodelyTv\Mooc\Courses\Application\Find;
+
+final class CoursesResponseConverter
+{
+    /**
+     * @param array
+     * @return CoursesResponse
+     */
+    public function __invoke(array $courses): CoursesResponse
+    {
+        return new CoursesResponse($courses);
+    }
+}
diff --git a/src/Mooc/Courses/Application/Find/FindCoursesQuery.php b/src/Mooc/Courses/Application/Find/FindCoursesQuery.php
new file mode 100644
index 000000000..1b7a56c55
--- /dev/null
+++ b/src/Mooc/Courses/Application/Find/FindCoursesQuery.php
@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace CodelyTv\Mooc\Courses\Application\Find;
+
+use CodelyTv\Shared\Domain\Bus\Query\Query;
+
+final class FindCoursesQuery implements Query
+{
+    
+}
diff --git a/src/Mooc/Courses/Application/Find/FindCoursesQueryHandler.php b/src/Mooc/Courses/Application/Find/FindCoursesQueryHandler.php
new file mode 100644
index 000000000..4dbaecb0b
--- /dev/null
+++ b/src/Mooc/Courses/Application/Find/FindCoursesQueryHandler.php
@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace CodelyTv\Mooc\Courses\Application\Find;
+
+use CodelyTv\Shared\Domain\Bus\Query\QueryHandler;
+use function Lambdish\Phunctional\apply;
+use function Lambdish\Phunctional\pipe;
+
+final class FindCoursesQueryHandler implements QueryHandler
+{
+
+    /** @var callable */
+    private $finder;
+
+    /**
+     * @param CoursesFinder $finder
+     */
+    public function __construct(CoursesFinder $finder)
+    {
+        $this->finder = pipe($finder, new CoursesResponseConverter());
+    }
+
+    public function __invoke(FindCoursesQuery $query): CoursesResponse
+    {
+        return apply($this->finder);
+    }
+}
diff --git a/src/Mooc/Courses/Domain/CourseRepository.php b/src/Mooc/Courses/Domain/CourseRepository.php
index bf12fad1b..b1381909f 100644
--- a/src/Mooc/Courses/Domain/CourseRepository.php
+++ b/src/Mooc/Courses/Domain/CourseRepository.php
@@ -11,4 +11,6 @@ interface CourseRepository
     public function save(Course $course): void;
 
     public function search(CourseId $id): ?Course;
+
+    public function all(): ?array;
 }
diff --git a/src/Mooc/Courses/Domain/CoursesFinder.php b/src/Mooc/Courses/Domain/CoursesFinder.php
new file mode 100644
index 000000000..464de2c3e
--- /dev/null
+++ b/src/Mooc/Courses/Domain/CoursesFinder.php
@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace CodelyTv\Mooc\Courses\Domain;
+
+final class CoursesFinder
+{
+    public function __construct(private CourseRepository $repository)
+    {
+    }
+
+    public function __invoke(): array
+    {
+        /** @var array */
+        $courses = $this->repository->all();
+
+        if (null === $courses) {
+            throw new CoursesNotFound();
+        }
+
+        return $courses;
+    }
+}
diff --git a/src/Mooc/Courses/Domain/CoursesNotFound.php b/src/Mooc/Courses/Domain/CoursesNotFound.php
new file mode 100644
index 000000000..990b9a0b6
--- /dev/null
+++ b/src/Mooc/Courses/Domain/CoursesNotFound.php
@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace CodelyTv\Mooc\Courses\Domain;
+
+use CodelyTv\Shared\Domain\DomainError;
+
+final class CoursesNotFound extends DomainError
+{
+    public function __construct()
+    {
+        parent::__construct();
+    }
+
+    public function errorCode(): string
+    {
+        return 'courses_not_found';
+    }
+
+    protected function errorMessage(): string
+    {
+        return sprintf('Oops! Courses not found.');
+    }
+}
diff --git a/src/Mooc/Courses/Infrastructure/Persistence/DoctrineCourseRepository.php b/src/Mooc/Courses/Infrastructure/Persistence/DoctrineCourseRepository.php
index b17007d92..ac7a6b461 100644
--- a/src/Mooc/Courses/Infrastructure/Persistence/DoctrineCourseRepository.php
+++ b/src/Mooc/Courses/Infrastructure/Persistence/DoctrineCourseRepository.php
@@ -20,4 +20,9 @@ public function search(CourseId $id): ?Course
     {
         return $this->repository(Course::class)->find($id);
     }
+
+    public function all(): ?array
+    {
+        return $this->repository(Course::class)->findAll();
+    }
 }
diff --git a/src/Mooc/Courses/Infrastructure/Persistence/FileCourseRepository.php b/src/Mooc/Courses/Infrastructure/Persistence/FileCourseRepository.php
index 05124081d..3924c2106 100644
--- a/src/Mooc/Courses/Infrastructure/Persistence/FileCourseRepository.php
+++ b/src/Mooc/Courses/Infrastructure/Persistence/FileCourseRepository.php
@@ -24,6 +24,12 @@ public function search(CourseId $id): ?Course
             : null;
     }
 
+    public function all(): ?array
+    {
+        // TODO
+        return [];
+    }
+
     private function fileName(string $id): string
     {
         return sprintf('%s.%s.repo', self::FILE_PATH, $id);
diff --git a/src/Mooc/Videos/Application/Update/UpdateVideoTitleCommand.php b/src/Mooc/Videos/Application/Update/UpdateVideoTitleCommand.php
new file mode 100644
index 000000000..9787bf2d5
--- /dev/null
+++ b/src/Mooc/Videos/Application/Update/UpdateVideoTitleCommand.php
@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace CodelyTv\Mooc\Videos\Application\Update;
+
+use CodelyTv\Shared\Domain\Bus\Command\Command;
+
+final class UpdateVideoTitleCommand implements Command
+{
+    public function __construct(private string $id, private string $title) { }
+
+    public function id(): string
+    {
+        return $this->id;
+    }
+
+    public function title(): string
+    {
+        return $this->title;
+    }
+}
diff --git a/src/Mooc/Videos/Application/Update/UpdateVideoTitleCommandHandler.php b/src/Mooc/Videos/Application/Update/UpdateVideoTitleCommandHandler.php
new file mode 100644
index 000000000..2b5e64157
--- /dev/null
+++ b/src/Mooc/Videos/Application/Update/UpdateVideoTitleCommandHandler.php
@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace CodelyTv\Mooc\Videos\Application\Update;
+
+use CodelyTv\Mooc\Videos\Domain\VideoId;
+use CodelyTv\Mooc\Videos\Domain\VideoTitle;
+use CodelyTv\Shared\Domain\Bus\Command\CommandHandler;
+
+final class UpdateVideoTitleCommandHandler implements CommandHandler
+{
+    public function __construct(private VideoTitleUpdater $updater) { }
+
+    public function __invoke(UpdateVideoTitleCommand $command) {
+        $id       = new VideoId($command->id());
+        $title    = new VideoTitle($command->title());
+
+        $this->updater->__invoke($id, $title);
+    }
+}