Tune in to a cast
Open a public room on nastycast.com while the performer is on air.
NastyCast casts happen live. Capture the public cast at the source instead of rigging up a second computer.
A cast on NastyCast plays out in real time: the performer goes live, the public room fills up, and when the broadcast ends you cannot count on a rerun. Some viewers go as far as building a capture rig with a second computer to keep shows. If you simply want to record a NastyCast live show, there is a much lighter option. This extension records the public cast directly from the room you are watching and saves it as an MP4.
On nastycast.com, open a public room while the cast is on air. The extension adds a Download button to the video player; click it, pick a quality from the menu that opens, and the recording gets going. The toolbar popup carries Start and Stop, plus the room name, a menu of the qualities the cast is streaming and a counter showing elapsed time. If it is easier, right-click the page and pick Download Nasty Cast Stream. Press Stop in the popup or the X on the on-page progress panel when you have enough, or let the recording close itself when the cast ends.
Each file is an MP4 holding H.264 video and AAC audio, named after the room and saved to a NASTYCAST folder in Downloads. Because the extension saves the stream rather than re-capturing a monitor signal, the quality you select is the quality you keep, and the audio comes straight from the room. File assembly happens inside your browser. Recordings never go to SERP servers, and the extension has no ads or trackers.
NastyCast viewers can run it in Chrome, Edge, Brave, Opera, Whale or Yandex on Windows, macOS and Linux, with no extra hardware. Three recordings are free after you sign in with email, without a card, and the subscription then costs $17 a month; cancel at any time. Leave the tab open until you press Stop. Public casts that are live can be saved; private ones cannot.

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Open the page, let the extension detect what is available, and save the file to your computer.
Open a public room on nastycast.com while the performer is on air.
Click Download on the player and pick a quality for the cast, or choose one in the popup and press Start.
Press Stop in the popup, click the X on the progress panel, or let the cast end; the MP4 is written to NASTYCAST in Downloads.
Core capabilities included in Nasty Cast Video Downloader.
Saves a live NastyCast cast directly, with no capture card or second computer involved
Download button with a quality menu sits on the nastycast.com video player during public broadcasts
Toolbar popup lists the room, the cast's quality options, Start, Stop and elapsed time
Download Nasty Cast Stream appears when you right-click a room page
Keeps the exact quality level you chose, without a second round of capture
Room sound recorded straight from the cast, not through a cable or microphone
MP4 files with H.264 video and AAC audio in a NASTYCAST folder in Downloads
Automatically finishes the file when the cast goes off air
Notifies you on the desktop about every saved or failed NastyCast recording
Some viewers record live shows with a capture card feeding a second computer. It is thorough but heavy. Here is how it compares for NastyCast casts.
NastyCast Recorder
Nothing to buy beyond the subscription
Capture card and second computer
Capture card, cables and often a second machine
NastyCast Recorder
Stream saved at the quality picked in the popup
Capture card and second computer
Records the scaled picture your display output sends
NastyCast Recorder
Audio taken directly from the NastyCast room
Capture card and second computer
Audio routed through cables or capture settings
NastyCast Recorder
Set up in minutes inside the browser
Capture card and second computer
Hardware wiring and software configuration first
NastyCast Recorder
Limited to public nastycast.com rooms
Capture card and second computer
Can record anything shown on screen, from any source
Available on major desktop browsers and operating systems used in day-to-day workflows.
Pick the browser build you need. When a direct GitHub release is available, you can grab the ZIP there.
Open the main product page to get the Chrome build while direct release links are being added.
Firefox support is in progress and will be enabled soon.
Open the main product page to get the Edge build while direct release links are being added.
Open the main product page to get the Opera build while direct release links are being added.
Open the main product page to get the Brave build while direct release links are being added.
Open the main product page to get the Whale build while direct release links are being added.
Open the main product page to get the Yandex build while direct release links are being added.
Install from GitHub releases or your user dashboard. ZIP builds include the full desktop extension.
Every requested permission and the job it performs inside the extension.
Saves NastyCast recordings into the NASTYCAST folder in Downloads.
Keeps your Nasty Cast sign-in, trial count and quality choice.
Lets the popup read the NastyCast room in your current tab when you click the icon.
Keeps the nastycast.com recording attached to its tab so the timer and Stop control work.
Adds the Download button and quality menu to the NastyCast player, and the progress panel whose X ends a recording.
Shows a desktop notice when a NastyCast recording finishes or fails.
Adds Download Nasty Cast Stream to the right-click menu.
Provides a local background page that assembles the captured NastyCast stream into an MP4.
Broad HTTPS access lets the extension fetch the live video a NastyCast room streams from the servers behind the player, and its controls are added to nastycast.com room pages. auth.serp.co is used to sign you in and count the trial; api.github.com supplies update checks.
Better to know the boundaries up front than find out after checkout.
A NastyCast cast is saved only from the moment you start recording onward.
Private, hidden and password-protected casts are excluded.
Closing or reloading the NastyCast tab ends the capture.
No alerts or automatic start when a cast begins.
Picture quality tops out at the level the performer streams.
The extension does not edit, cut or convert saved casts.

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Keep live NastyCast broadcasts without buying extra hardware
No cables, capture software or second screen to manage
Better picture than re-capturing a monitor output
Everything runs in a browser you already have