Linking Mux as a source

The Mux connector syncs your Mux Video data into the PostHog Data warehouse, so you can analyze your assets, live streams, and uploads alongside your product data.

Prerequisites

You need a Mux account with admin access so you can create an access token. Tokens are scoped to a single Mux environment.

Adding a data source

1. In PostHog, go to the Sources tab of the data pipeline section.
2. Click + New source and click Link next to this source.
3. Enter your credentials (see Configuration below) and click Next.
4. Select the tables you want to sync, choose a sync method and frequency, then click Import.

Once the syncs are complete, you can start querying this data in PostHog.

When linking Mux, you'll need:

• Access Token ID – create an access token under Settings → Access Tokens in your Mux dashboard.
• Secret Key – shown alongside the Access Token ID when you create the token. Grant Mux Video (read) for assets, live streams, uploads, playback restrictions, and transcription vocabularies, and Mux System (read) for signing keys.

Sync modes

Each table can be synced in one of several modes, depending on what the source supports:

• Webhook (when available) – the source pushes changes to PostHog in real time. Fastest freshness, lowest ongoing cost, and the only mode that reliably captures updates and deletes.
• Incremental – only new or updated rows are synced on each run, using a cursor field (such as an updated_at timestamp). Cheaper than a full refresh, but deletes aren't captured.
• Append only – new rows are appended using a cursor field; existing rows are never updated. Ideal for immutable, append-only tables like event logs.
• Full refresh – the whole table is reloaded on every sync. Use it when a table has no reliable cursor or when you need deletions reflected.

See sync methods for a full explanation of how each mode works and how to choose between them.

All Mux tables are full refresh only, since the API exposes no incremental sync filter.

Configuration

Supported tables

The tables available from this source are discovered from your account when you connect it, so the exact list depends on your data. Once connected, you can pick which tables to sync from the sources tab.

Troubleshooting

• If you get an authorization error, your Mux access token is invalid or has been revoked. Create a new access token in your Mux dashboard, then reconnect.
• If you get a permission error, your access token is missing the read permissions needed to sync this data. Grant Mux Video and Mux System read access, then reconnect.

If your sync is failing or data looks wrong, see the Data warehouse troubleshooting guide. If that doesn't help, contact support – we're happy to help.