how do i go about deleting my favorites?

so i have around 10k favorites on tiktok and its really affecting my storage. i started using the collection feature last year or the year before that i think. i can go through the collections and remove favorites so that parts easy.

what im concerned about are the videos i favorited years ago before i started using collections. i have too many to scroll all the way down without my phone/laptop crashing but i really need to unfavorite them.

what should i do?