Update docs for logging changes + new video (#1618)

mkdocs/docs/config/options.md

@@ -220,7 +220,10 @@ config file.
 * **noforget**: Effectively sets `remember-nodes` to infinity.
 * **allow-idmap=BOOL**: Enables idmap (identity mapping). (default:
   true)
-
+* **debug**: Enable debugging information. At the moment limited to a
+  FUSE message trace saved to `log.file`. (default: false)
+* **log.file**: The file path for the FUSE message trace. Empty string
+  will set to stderr. (default: stderr)
 
 **NOTE:** Options are evaluated in the order listed so if the options
 are **func.rmdir=rand,category.action=ff** the **action** category

mkdocs/docs/error_handling_and_logging.md

@@ -88,11 +88,18 @@ filesystems. Mainly `ext4`.
 
 ## Logging
 
-Filesystems, and therefore mergerfs, are doing lots of small actions
-at high speed. It simply isn't reasonable to log all the actions of
-the system. That said: certain details are logged at startup and when
-performing maintenance tasks. These are logged via `syslog` and on
-`systemd` based systems can be viewed by running
+Filesystems, and therefore mergerfs, are doing **lots** of small
+actions at high speed. It simply isn't reasonable to log all the
+actions of the system all time time. However, there is a debug mode
+which can be toggled on as needed, even at runtime, which will record
+some information to help with debugging. The main thing it will record
+is a trace of all FUSE messages to the location defined by the
+`log.file` option. See [config section](config/options.md) for more
+details.
+
+That said even with debug mode disabled mergerfs will log certain
+details via `syslog` which on `systemd` based systems can be viewed by
+running:
 
 ```
 journalctl -t mergerfs

mkdocs/docs/media_and_publicity.md

@@ -68,6 +68,8 @@
 * 2025-04-23 - [How to build the Perfect Media Server | Part 1 - The Tech Stack | mergerfs, SnapRAID, and docker.](https://www.youtube.com/watch?v=Yt67zz9p0FU)
 * 2025-06-12 - [DIY Unraid-like functionality](https://www.youtube.com/watch?v=fR0XhaWvR1E)
 * 2025-09-22 - [استفاده از Snapraid و MergerFS | جایگزین RAID5](https://www.youtube.com/watch?v=GA6OvaUBKXs)
+* 2026-02-10 - [Never run out of space again! Using MergerFS with Immich to expand your storage seamlessly](https://www.youtube.com/watch?v=Vbu4WzWUikQ)
+
 
 ## Podcasts