As discussed in #1181, I suggest to make embedding videos an optional
feature.
This behavior aligns well with recently merged PR #2312.
Open questions:
1. I added a youtube link to `papers.bib`. Is this link okay?
2. I set `enable_video_embedding: false` as the default. I argue that
privacy settings should be the default. Also, the current implementation
of `video.liquid` only works for some very specific video URLs. For
example, to embed youtube, specialized links must be used to avoid
`X-Frame-Option` issues. This behavior can lead to a broken embedding,
which would not look very nice.
Feedback welcome.
a03b2e78e6