Code Review only allows for reviews of code that is written/maintained by the author. We have that requirement for multiple reasons, including legal (copyright) and moral (to avoid code-shaming).
When a question asks to compare the poster's solution against some arbitrary solution found on GitHub, that is a underhanded way to ask for a review of third-party ...
Questions on Code Review must have the code in the post.
Can I put my code on a third party site and link to the site in my question?
Reviews of code not stored here
Can I ask for a review on a website?
Questions that ask for you to e-mail them to get the code
If you want reviews of each video:
Post the relevant final code from the video you want reviewed....
The bare minimum to post a question is to include some code.
If you were to post a question that only included main.cpp, but not Drawable.cpp or Drawable.h, and didn't mention anything about this Bitmap.cpp, then it'd be on-topic, but a really poor question (as we don't know what half the code is).
Building from this, you can include the code you want, and ...