Since Peertube uses a Postgres database, we can log in and manually do bulk changes to videos. Things like updating a channel ID, Category, or Privacy can all be easily changed and it is easy to do bulk changes.
Access the Database
Login as the peertube user via ssh
Connect to postgres
select * from video;
There is a bit much information, lets clean it up a bit
select name,category,id,"channelId" from video;
View all the channels. The id field is the channelId that is used in the above video table.
select id,name from "videoChannel";
Change video channel
update video set "channelId" = 100 where id = 123;
Replace 100 with the actual channelId and 123 with the id of the video. Can use the above commands to find that info.
Change Privacy Settings
The privacy settings are what determine if a video is Public, Private etc.
The following command can update the privacy setting for a video
update video set privacy = 3 where id = 101;
There are 4 privacy settings. Change 3 to one of the following.
1 = Public
2 = Unlisted
3 = Private
4 = Internal
Change 101 to the video id you want to change.
You can change the privacy settings for all videos in a channel with something like the following
update video set privacy = 4 where "channelId" = 100;