Greasy Fork

Visibility of previously viewed youtube videos

Since youtube passed from http to https protocol no longer recognize URLs contains prefix HTTP in Mozilla Firefox browsing history.Now only URLs with HTTPS are seen as already viewed.
I have over 30000 videos in Mozilla history.
Is there a way to Improved visibility of both HTTP an HTTPS previously viewed videos (video feed) in right bar on youtube (by displaying different color over name)
Please help!
Thank you!

To clarify some things: I thought that "already viewed" status is remembered by youtube server in your youtube account history, and you're saying it simply erased all of your history? Otherwise you can try manually editing places.db file in your firefox profile folder and replace http with https (I would use sqlitebrowser or similar app to export the db to an .sql or .csv file then in any text editor replace http://www.youtube.com with https://www.youtube.com and then import the edited file back).

Thank you! wOxxOm!
I do not have an account in youtube.
In my Mozilla Portable have file places.sqlite.
With mozillahistoryview i exprot it in XML(40MB), HTML(47MB) and CSV(17MB) files.
I try to edit XML file with foxe242 but in the middle of the process of replacement it's crashes.
Then i open CSV file with MS Word and replace all HTTP with HTTPS successful.But i cant find program to import the edited file back.I will be very grateful to you if you can explain me step by step how to it with sqlitebrowser (it already installed)
Thanks!

1. exit Firefox
2. start sqlitebrowser
   • menu file->open, paste this: %appdata%\mozilla\firefox\profiles and press the Enter key, then choose your profile folder and open places.sqlite
   • menu file->export->database to sql
3. open this exported file in normal text editor like notepad or notepad++
   • invoke Find&Replace (usually Ctrl-H hotkey), replace http://www.youtube.com with https://www.youtube.com and press/select Replace All
   • save the file
4. in sqlitebrowser go to menu file->import->database from sql
   • "create a new database?" -> yes
   • "save the currently opened places.db?" -> no
   • "name of the new database?" -> places2.sqlite
   • exit sqlitebrowser
5. in the Firefox profile folder rename the old places.sqlite as places-old.sqlite, and places2.sqlite as places.sqlite - note that depending on your Windows Explorer settings the extension .sqlite might be hidden, in which case you don't have to type it here.

It's work!!!
THANKS a Lot! wOxxOm!