feat(android): back the videos of the chosen albums up beside the photos

A 'Videos too' option, off by default, sends them into the same YYYY/YYYY-MM
folders. Files are read from the phone a ranged chunk at a time, so a large
video is never whole in the page.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/docs/USERGUIDE.md b/docs/USERGUIDE.md
index 1587160..dac1f9f 100644
--- a/docs/USERGUIDE.md
+++ b/docs/USERGUIDE.md
@@ -408,6 +408,10 @@ backup at all.
 
 - **Set up** asks for access to your photos, then for the albums to send. The
   camera is ticked; screenshots and other albums are yours to add.
+- **Videos too** adds the videos of the same albums, beside the photos. It is
+  off by default: videos are large, and the first backup can take a while.
+  They are sent on Wi-Fi like photos. For now they show in Files, not in the
+  Photos tab.
 - By default **the photos already on the phone are sent too**, newest first,
   then each new one. Choose "Only photos taken from now on" to skip the ones
   already there. Before the first send you are told how many photos and how
@@ -422,7 +426,8 @@ backup at all.
   the group is not sent again, unless the application is reinstalled. A photo
   you edit on the phone is sent again beside the original, with `-edited-` and
   the date in its name.
-- **Where a photo was taken is removed** from the copy that is sent.
+- **Where a photo or video was taken is removed** from the copy that is sent
+  (Android 10 and later).
 
 #### Contacts