What's Viktor Watching
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Full Walkthrough: Workflow for AI Coding — Matt Pocock
Matt Pocock's 96-minute AI Engineer workshop (1.6M views): a complete idea-to-production workflow for AI coding, built on the thesis that 20-year-old software engineering fundamentals — not new AI paradigms — are what make agents work (Pragmatic Programmer, Fowler, Brooks, Ousterhout cited throughout; closing advice: "head to Amazon and just buy a ton of those old books").
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How I use LLMs
Karpathy's 2h11m general-audience sequel to Deep Dive into LLMs (2.7M views, Feb 2025): a hands-on tour of the LLM app ecosystem — ChatGPT as the feature-rich incumbent, plus Claude, Gemini, Grok, Perplexity, DeepSeek, Le Chat — organised by what goes into the context window, not by vendor.
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Deep Dive into LLMs like ChatGPT
Karpathy's 3.5-hour general-audience deep dive (9.7M views, Feb 2025): the full ChatGPT pipeline — pretraining (internet → tokens → next-token prediction), supervised fine-tuning (conversations → an assistant persona), and reinforcement learning (practice problems → emergent reasoning) — mapped throughout onto how children learn from textbooks: exposition, worked examples, practice problems.
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Apple Watch Ultra 4 In-Depth Review: As Good As the Hype?
The payoff to last week's two hands-on videos: DC Rainmaker's full in-depth Ultra 4 review after swim/bike/run/row/track testing against a Polar H10 chest strap, published the day before the watch ships. Bottom line on the sensor: "this new heart rate sensor is very accurate thus far in my testing" — genuinely excellent plots even in the hard cases (outdoor road cycling vibration, rowing hand motion) — with the caveat that cold weather, where optical HR actually struggles, hasn't been tested yet (he lives somewhere hot; Apple's own study sites were California and Malaysia).
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How I Film Cinematic Cycling Videos With the DJI Osmo Action 6 (Settings + Workflow)
A one-camera challenge: Philip Carneiro films an entire 18-minute cycling video — riding footage, B-roll, and the talking-head sections — on nothing but a DJI Osmo Action 6, with the only exceptions being the shots where the camera or its accessories appear in frame (frame_0007 carries the on-screen title card "THIS VIDEO IS ENTIRELY SHOT ON THE DJI OSMO ACTION 6").
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Apple Watch Ultra 4 & Series 12: BETTER HR, Steps & ECG! (All You Need To Know)
Series 12 ($399, frame_0013) and Ultra 4 ($799) share a redesigned optical + electrical heart-rate sensor on the new S11 chip: repositioned photodiodes, larger power-efficient green LEDs, improved ECG electrodes (frame_0005, frame_0009, frame_0011).
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Apple Watch Ultra 4 Hands-On: 24 New Things Tech Deep-Dive
The Ultra 4 sibling to the same-day Series 12 hands-on, shot at Apple Park in the same session — and it carries the mechanism the Series 12 video left out: the LED array has been rearranged so the color diodes are now clustered by type (four green, four red, four infrared), which lets Apple drive 24/7 background readings off the green LEDs instead of the infrared ones. That's why background HR could go from every 5 minutes to every 5 seconds; it's an LED-grouping change, not just a faster sample loop.
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Apple Watch Series 12 Hands-on: What's Actually New?
DC Rainmaker's same-day hands-on from Apple Park: the Series 12 ($399, ships Sept 18) gets the S11 chip, a rebuilt optical HR package (24% larger rearranged ECG electrode area, eight windows with double photodiodes replacing four dots, a new LED array), a 60% stronger display, and new colors (dark bronze, gold, ceramic white/blue, Hermès) — "it's actually impressive how many more features there are than they showed in the keynote."
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25 Cycling Kit Brands ROBBING You Blind (And 7 That Are Actually Worth The Money)
A faceless countdown (25 "robbing you blind" brands interleaved with 7 "worth the money") from CycleWorth — same content-farm family as the Fix Home listicle, but a real step up: named suppliers, company financials, and checkable at-home tests instead of ad-copy blurbs.
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You need to switch to Linux RIGHT NOW!!
NetworkChuck (mainstream tech YouTuber, ~4M subs energy, longtime Ubuntu/Kali user) installs Omarchy Quattro, declares "this is the year of the Linux desktop," and commits to migrating his desktop, laptop, and a new Framework machine — with exclusive DHH interview clips and typecraft (Chris) as on-camera guide throughout.
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Herdr Crash Course — Step-by-Step Setup
Alejandro AO (AI educator, builds the Tau agent at Hugging Face) delivers a structured Herder crash course: demo → what a multiplexer is → local + VPS setup → having an agent control Herder itself. Notably a second-chance conversion: "the first time I used Herder... I didn't like it. Then I tried it again two weeks ago and I haven't been able to stop using it."
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This Tmux "Rewrite" Is Actually Brilliant
DevOps Toolbox (Omer, a self-professed tmux power user with published tmux plugins) reviews Herder (herdr.dev) — the Rust "tmux rewrite" agent-native terminal multiplexer — and, despite arriving maximally skeptical of "multiplexers for agents," mostly converts.
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Garmin CIRQA Ultimate Scientific Review!
Rob (The Quantified Scientist) systematically tested the Garmin CIRQA smart band against a Polar H10 ECG chest strap (exercise HR) and a ZMax EEG headband (sleep stages), worn both on the wrist and on the biceps — placement turns out to be the single biggest factor in this review.
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Garmin Cirqa In-Depth Review: Reality vs Expectations
DC Rainmaker (Ray) reviews the $199 Garmin CIRQA screenless band after weeks of testing (himself and his wife) across running, cycling, swimming, hot and cold weather — framing everything as "reality vs expectations" set by Whoop, Fitbit Air, Amazfit Helio, and Polar Loop.
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The Man Who Calls BS On AI: They’re LYING About AI, 2027 Is When It All Breaks! | Ed Zitron
Ed Zitron (tech PR veteran, "Better Offline" podcast, ~16 years in the industry) tells Steven Bartlett that generative AI is "at its heart a con" — not that the software does nothing, but that its capabilities and financials are systematically overstated: "the largest non-consensual push of technology in history."
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how i film my bike rides like a movie — with the DJI Pocket 4P
Gerrit Knein (cyclist/creator, DJI-sponsored video — disclosed on screen) shows his hands-free setup for filming road rides with the new DJI Osmo Pocket 4P, which just launched in Europe: gimbal-stabilized "cinema car shot" footage from a regular Sunday ride, no film crew.
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I'm ditching tmux for herdr!
typecraft (Chris, ~10-year tmux user, Neovim/Linux channel) announces he's fully switching from tmux to Herder — the least hedged of the archive's three Herder takes: "I'm definitely ditching tmux for Herder... I don't see any other way."
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DHH: Future of Programming, AI, Agentic Engineering, Vibe Coding & Linux | Lex Fridman Podcast #501
13 months after his AI-skeptic appearance, DHH returns fully converted: Omarchy Quattro (his Arch-based Linux distro) shipped with 100% agent-written code — he reviewed shape and critical model-layer lines, but hand-wrote nothing. "There are decades where nothing happens and weeks where decades happen."
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60 Cool Bike Gadgets on Amazon You’ll Instantly Want to Try
A faceless content-farm compilation from "Fix Home": ~50 bike products (despite the "60" in the title) presented in identical ad-copy blurbs — roughly 25-30 seconds each, spec recitation, zero hands-on testing, zero prices, zero criticism, zero ranking.