I need to know if youtube API V3 supports searching inside a specific youtube playlist? And is there any other way to do that?
Unfortunately youtube data API 3 does not support searching inside a playlist, but as a work around we can add a string to user's search so that the results will be near to what is needed, in my case for example I have prefixed all the video titles in a specific playlist with the name of that playlist and then I had to prefix users search query with the specified playlist name, the only drawback is that I had to rename all of the videos to include the prefix.
playlist name: exotic cars
search query: exotic cars + user input
And don't forget to search channel videos only.