I think that YouTube is a great platform where you can learn and deepen programming languages and frameworks.
In fact, for the developer who wants to learn development, YouTube is a totally free platform where enthusiasts and experts provide their expertise, creating content and videos. As I am passionate about PHP and the Laravel, I have collected a list of great channels that I follow.
I would like to share this my list with all of you.

If you have some more channels that you want to suggest or share, please feel free to add a comment, and I will update the list.

• Laravel Daily: Tutorials, and demo projects with Laravel framework. hosted by Povilas Korop https://www.youtube.com/c/LaravelDaily
• Christoph Rumpel: latest updates from Laravel world. Hosted by Christoph Rumpel https://www.youtube.com/c/christophrumpel
• Pascal Baljet: the creator of Laravel Splade a lot of videos about live coding, and tutorials for Laravel ( Docker, Eloquent). There is a series named Laravel School. https://www.youtube.com/c/PascalBaljet
• Brent On PHP: hosted by Brent Roose. I love his videos about PHP versions and features,https://www.youtube.com/user/BrenDtRoose
• Amir Kamizi: basic but useful videos about PHP programming. https://www.youtube.com/channel/UCdIrfxV5xbiDrJjME9QQkHw
• Derick Rethans: videos about Xdebug by the author of Xdebug https://www.youtube.com/c/DerickRethansXdebug
• Laracon Online: The official Laravel online conference, you can find the recorder session of Laracon https://www.youtube.com/c/LaraconOnline
• Program with Gio: a lot of high quality video about PHP and Laravel https://www.youtube.com/c/ProgramWithGio
• Mateus Guimarães: tons of Laravel videos. I like the "30 Days of Laravel" series. https://www.youtube.com/c/MateusGuimar%C3%A3es
• Laravel Podcast: https://www.youtube.com/c/LaravelPodcast
• JustSteveKing: I like watching Steve' videos for learning PHP and Laravel "in the right way" https://www.youtube.com/c/JustSteveKing
• Freek Van der Herten: if you are using Laravel, I'm sure you are using one of his package (do you know Spatie?) https://www.youtube.com/c/FreekVanderHerten
• Michael Dyrynda: probably you know Laravel News Podcast, Michael is a great content creator (videos and podcast) https://www.youtube.com/c/MichaelDyrynda
• Laravel News: The official YouTube channel of Laravel News https://www.youtube.com/c/Laravel-news
• Laracasts: i like Larabits to keep updated on Laravel world. It is not just about Laravel, you can watch also Learn Vue 3. High quality content. https://www.youtube.com/c/Laracastsofficial
• PHP South Wales: the local PHP user group for those living in the South Wales region of the United Kingdom. They used this channel to store some videos and presentations of their meetups. https://www.youtube.com/channel/UCzQRSSaIV2Ajvl81BxPQDZA
• Laravel: The Laravel official channel. You can find a lot of videos made by Mohamed Said. https://www.youtube.com/c/LaravelPHP
• Laracon EU: you can find the recorded session of Laracon EU https://www.youtube.com/c/LaraconEU
• Nuno Maduro: If you are using Laravel or PestPHP or Larastan or Laravel Zero or Pint you already know this amazing guy. https://www.youtube.com/c/NunoMaduro
• Mohamed Said: you can watch videos on advanced topic about Laravel https://www.youtube.com/c/themsaid
• Matt Stauffer: I suggest you watch "Things worth learning" series where Matt hosts some great developers https://www.youtube.com/c/MattStauffer
• Erika Heidi: some live coding with Erika https://www.youtube.com/c/ErikaHeidi
• Beyond Code: videos from Beyond Code team https://www.youtube.com/channel/UCwRNsgqoPSh4pLTRJEPqo2Q
• PHP London: recorded sessions from PHP London meetup https://www.youtube.com/c/PHPLondon
• Andrew Schmelyun: advanced Laravel topics https://www.youtube.com/c/ASchmelyun
• Caleb Porzio: videos by Caleb about Livewire and AlpineJS https://www.youtube.com/user/calebporzio1
• Owen Conti: a lot of video covering tools from the Laravel ecosystem. https://www.youtube.com/c/owenconti
• GrUSP: you can find a lot of videos recorded during all the conferences organized by GrUSP. There are specific playlists for the PHPday conferences https://www.youtube.com/c/GrUSP
• Beer and Code: Brazilian channel, they do live videos about Laravel and Dev community, besides tutorial videos about Laravel https://www.youtube.com/c/BeerandCode
• Code with Burt: hosted by Bert, nice tutorials about Eloquent (and Laravel in general), and also you can find a Pint tutorial https://www.youtube.com/c/CodewithBurt
• CodeCourse: the videos about PHP and Laravel are well organized in Playlists. The channel covers some advanced topics and some basics as well, if you are starting to learn PHP take a look at PHP basics. https://www.youtube.com/c/codecourse
• Code with Dary: another great channel with a lot of courses like Laravel 9 for beginners, Symfony 6 fundamentals, and also courses for PHP. https://www.youtube.com/c/CodeWithDary
• Patricio On Code: the channel by Patricio covers topics like how to build full-stack web applications, how to build applications using Nova, and also videos about Docker. https://www.youtube.com/@PatricioOnCode
• Andre Madarang: the channel by Andre, you can find practical web development tutorials primarily in Laravel, VueJS, and Tailwind. https://www.youtube.com/@drehimself

What do you think about this list? If you want to add some interesting Youtube channels about PHP, Laravel, Symfony, or other frameworks and libraries in the PHP ecosystem, let me know!