Is there a way to search for specific videos in my like playlist on my account?
Quickly search and filter through the items in a playlist (like watch later or favorites). Search includes the title of the video and the user it was uploaded by. It will hide/show the playlist items as you type, empty the text box to show all items.
If you don't know how to install user scripts, see this helpful guide
click ctrl F in your browser window a search window appears in google browser type in the keyword looking for in the liked videos
p.s make sure you are in the liked videos display page in your browser window
When I search for specific videos on youtube i go to:
Settings -> (under the category LIBRARY) -> Liked videos.
That should give you your liked videos.