4K Playback

Seedr supports playback up to 2160p (4K UHD) on v2 with Master and Gold plans. That's four times the resolution of 1080p — every detail visible, text razor-sharp, colors vivid. Combined with our built-in player's adaptive bitrate technology, you get the highest quality your connection can handle without buffering. Streaming.

Quality by Plan

Quality caps at your plan tier. If your source file is lower quality, you get the source quality — we don't upscale. Compare Master & Gold plans →

How It Works

Seedr converts videos to HLS (HTTP Live Streaming) — same tech as Netflix and YouTube. Video streams in your browser without downloading the full file first.

• Instant start: Click play, video starts in seconds

• Adaptive bitrate: Quality adjusts to your connection speed

• Seek anywhere: Jump to any point without buffering the whole file

• Resume (v2): Pick up where you left off, even on different device

You can stream a 50GB 4K file without downloading it — you only fetch the segments you actually watch.

Chromecast

Cast from Seedr to your TV:

• Start playing video in Seedr

• Tap cast icon

• Select your Chromecast

• Video moves to TV

Your phone/laptop becomes the remote — play, pause, seek, adjust volume, change quality.

Supported Devices

• Chromecast Ultra: Full 2160p support

• Chromecast with Google TV (4K): Full 2160p support

• Chromecast (3rd gen): Up to 1080p

• Android TV / Google TV: Built-in cast, quality depends on device

• Smart TVs with Chromecast built-in: Varies by TV model

If your Chromecast doesn't support 4K, you'll get the highest quality it can handle.

Media Server Integration

Connect Seedr to your existing media server:

• Plex: Mount via WebDAV, Plex scans and serves to all your devices

• Jellyfin: Same WebDAV integration, open-source

• Roku: Dedicated Seedr channel

Why Use a Media Server?

Media servers like Plex add features Seedr's built-in player doesn't have: automatic metadata fetching, poster art, watched status tracking across devices, and apps for every platform. Seedr provides the storage and bandwidth; Plex provides the interface. Plex setup guide →

Format Support

• Containers: MP4, MKV, AVI, MOV, WebM, FLV, WMV, M4V, MPEG, 3GP. MKV with embedded subtitles works.

• Video Codecs: H.264, H.265 (HEVC), VP8, VP9, AV1, MPEG-4, MPEG-2. Common codecs play natively; rare ones get transcoded.

• Audio: AAC, MP3, AC3, DTS (converted), FLAC, Opus. Multi-channel preserved where possible.

• Subtitles: SRT, VTT, and embedded MKV subs. Timing adjustment if they're out of sync.

What About Unsupported Formats?

If a file uses a codec your browser can't play natively, Seedr transcodes it automatically. This adds a few seconds of processing time on first play. Once transcoded, subsequent plays are instant. Full format details →

Player Features

• Quality selector (auto or manual)

• Playback speed: 0.5x to 2x

• Picture-in-Picture (v2)

• Theater mode

• Fullscreen with auto landscape on mobile

• Multi-audio track switching (v2)

• Keyboard shortcuts (Space, arrows, M, F)

Keyboard Shortcuts

Offline Viewing (v2)

Cache videos for offline playback:

• Choose quality (360p saves space, 4K for full quality)

• Pin videos to prevent auto-cleanup

• Start watching while it downloads

You can cache content before a flight and watch it offline.

How Much Storage Does Caching Use?

Sizes vary based on content complexity. Action scenes compress less efficiently than static scenes.

Common Questions

Get Master — 4K Streaming

Master includes 1TB storage, 25 tasks, WebDAV.