St.video() issue - mp4 won't play on apple device

[randyzwitch]

A similar discussion happened here, I wonder if your issue gets solved as well:

Trouble with st.audio in Safari

Hey @jonah! Can you test on the streamlit-nightly? You can install it by uninstalling streamlit and run pip install streamlit-nightly. To explain the problem, Safari requires the server to support Range Requests. We found this problem with regard to videos, so I am sure this would also apply to audio See https://github.com/streamlit/streamlit/issues/1804#issuecomment-687328551 If it works great, it will be included in the next release.