Darius Cepulis
Senior Developer Experience Engineer
Pretends he knows more about coffee than he does. Happier when he's outside. Thinks the web is pretty neat.
Published on May 28, 2025 (about 1 month ago)
Tailwind is the worst form of CSS, except for all the others
Tailwind is weird, verbose, and opinionated… but it works. Here’s why it makes teams faster, more consistent, and a little less frustrated.
Published on April 8, 2025 (3 months ago)
We want your LLM to read our docs
llms.txt is a standard for LLMs to discover and read your website. Users can use LLMs like Claude or Cursor to talk with your docs, improving their experience.
Published on February 4, 2025 (5 months ago)
We have a Mux Player iframe, now!
We’re introducing an iframe embed option for Mux Player. It comes with all of Mux Player's features, plus more for social, SEO, and perceptual performance.
Published on October 14, 2024 (9 months ago)
Your docs are aging (and so are you)
When's the last time you audited your developer docs? We felt the pain that our customers were facing with our docs — and set off on an adventure to fix it.
Published on September 6, 2024 (10 months ago)
AI chatbots are banned from our docs… for now
We can learn a lot about the current state of large language models by talking about why we chose not to use an AI chatbot on our documentation site.
Published on August 15, 2024 (11 months ago)
Build an AI-powered interactive video transcript with Mux Player CuePoints
Build an interactive transcript with Mux Player CuePoints and AI. Use AI for caption generation, Speaker diarization (identification), and text formatting.
Published on May 16, 2024 (about 1 year ago)
React 19 lets you write impossible components
What can you do with Server Components and Actions in React 19? Let’s talk about how React 19’s features are a big deal, even for a simple marketing site.
Published on April 15, 2024 (about 1 year ago)
Why are video players so big? A trip down the rabbit hole of video playback engines
A video playback engine enables more complex video use cases like adaptive bitrate streaming and DRM, but at the cost of bundle size. Is it worth it?
Published on August 10, 2023 (almost 2 years ago)
Can React Server Actions finally fix forms?
React Server Actions offer a way of simplifying posting data to the server by calling a simple function instead. But do they live up to the promise?
Published on July 19, 2023 (almost 2 years ago)
Everything I wish I knew before moving 50,000 lines of code to React Server Components
Server Components run on the server instead of the client, giving you control over your bundle size and data fetching. Here’s everything we learned about them.
Published on January 20, 2023 (over 2 years ago)
The building blocks of great docs
Great documentation is the backbone of a great API company. How do you scale it and keep a good experience? Learn about information architecture, Next.js 13, React Server Components, and Tailwind.
Published on November 1, 2022 (over 2 years ago)
How we made Mux Player’s loading feel great
With lazy-loading and a blurhash placeholder, we make the loading experience of Mux Player feel great in our Next.js app
Published on September 13, 2022 (almost 3 years ago)
400 water bottles and a video guestbook at CascadiaJS
Mux was proud to be a sponsor at CascadiaJS 2022 – here's a recap of our experience in the high desert.
Published on April 27, 2022 (about 3 years ago)
Leaving an impression in our video guestbook
If you’ve ever attended a conference in person, you know just how taxing they can be. You try to present your best self: unravel the hotel iron from the closet, work that one uncooperative cowlick to ...