How to search for music within a playlist

Question

*DISCLAIMERS* For the YouTube Music app: You must download the entire playlist (Youtube premium feature). I can confirm this works on Android, unsure about iOS. 
For YouTube Music desktop/web: You must load your entire playlist. I can confirm this works on Windows within the Chrome and Firefox browser. Unsure about iOS and other browsers.
For those that want to search your playlist for a specific song/artist in the YouTube Music app, follow these steps: 
1) Download your entire playlist. This may take awhile if you're downloading several songs
• Open the YouTube Music app
• Navigate into your playlist
• Press the arrow pointing down. If you already downloaded your playlist, press the two arrows circling each other to update your downloads
2) Tap the search button and search your desired song/artist. Press the enter button, do not press any result that shows
3) Directly under the search bar, you'll see three options: YT MUSIC, LIBRARY and DOWNLOADS
4) Press DOWNLOADS
5) Do not press the downloaded playlist. This will direct you into that playlist with no change
6) You should immediately see "Songs", and if you don't, scroll down until you do
Here, you'll see all of the songs with your specified keyword located within your downloaded playlist. The songs displayed are in no particular order.
For those who want to search a playlist for a specific song/artist on YouTube Music desktop/web, follow these steps:
1) Navigate into your playlist
2) Load your entire playlist. This may take awhile if your playlist has a lot of music. Skipping this step will prevent the search prompt from detecting all the music with your specified keyword
• Slowly drag the side bar scroller down until you see the bar no longer updating its length. Scrolling too fast doesn't update the playlist properly
2) Press CTRL+F to open a search prompt for the webpage and enter your keyword. No need to press enter
Clicking the arrows in the search prompt allows you to easily navigate to different songs that include your keyword.
While these methods aren't perfect, they're useful until YouTube can roll out official search functionality within playlists. I hope this helps anyone with playlists that have more than 300 songs, because it certainly helped me.