Get captions from embedded YouTube videos (iss. #5)

[lsloan]

Resolves #5.

Search the contents of Canvas Page objects for YouTube videos embedded via iframe elements.

Test Plan

Preparation

1. Clone this branch (lsloan:5-YouTube-captions) to a new directory named langchain-doc-canvas_testplan and cd into it…

   git clone -b 5-YouTube-captions https://github.com/lsloan/langchain-doc-canvas.git langchain-doc-canvas_testplan
   cd langchain-doc-canvas_testplan

2. Create a Python virtual environment and activate it…

   python3.11 -m venv .venv-testplan
   source .venv-testplan/bin/activate

3. Install Python dependencies for the module, development, and testing…

   pip install -r requirements.txt

4. Get a Canvas API token. Either use the token for itsaistu or follow these steps to create a new token.
   1. While authenticated to Canvas as a user you'd like to use for testing, go to: https://umich.instructure.com/profile/settings
   2. Click the "New Access Token" button and follow the prompts.
   3. Ensure that the user the token is associated with has an "Observer" role in a course you'd like to use for testing.

Run Example Program

1. Set environment variables with the Canvas API URL, API token, and course ID…

   export TEST_CANVAS_API_URL=https://umich.instructure.com  # production Canvas
   export TEST_CANVAS_API_KEY=your_API_token_from_preparation_step_4
   export TEST_CANVAS_COURSE_ID=718331  # lsloan-caption, for example

   Testing configuration available in Dropbox:
   https://www.dropbox.com/scl/fi/mzcf6ccqugvr1n5yi84ha/.env.txt?rlkey=6qx7352jvx50ktbhbioarjms2&st=o79puh7x&dl=0

2. Run the program canvas-test.py to get captions from some existing YouTube videos…

   python canvas-test.py

[lsloan]

@mlhess, I've updated the syllabus support. I have some minor adjustments to make on its metadata.

I didn't have enough time to figure out the best support for YouTube links in PDFs, as described by the instructor we wrote to. However, I've added "TODO" comments in the code where support for that and Powerpoint files should be added.