Simon Willison’s Weblog

HTML5 video markup, compatibility and playback. Everything you need to know about embedding HTML5 video on a page, complete with multiple codecs to cover the various supporting browsers and a fallback to Flash.

Posted 11th February 2010 at 5:49 pm

Recent articles

Claude can write complete Datasette plugins now - 8th October 2025
Vibe engineering - 7th October 2025
OpenAI DevDay 2025 live blog - 6th October 2025

flash 69 html5 83 niall-kennedy 9 video 33

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe