all channels I use are brand new, but aged channels make things easier, thats true.especially grey/blackhat strategies. low comp niches ranking one for some weeks should still work with basics, like file name and star rating, sense making keyword stuffing in description (even auto created/spinned textes should do it), some backlinking and following youtubes upload-process-requirementsy. best strategy always was and will be: just be first to upload smth and have unique content. as more competition, the more steps must be done. playlist-marketing; descriptio0n seo; link-wheels; Plattform reuploads (vimeo etc); social signs (FB; Twitter; Reddit; Pinterest; Tumbler) thats youtubs priority chart from 01/19...... since youtbes and googles databases are synchronized there are all these super-guru-strategie-videos with these click-cent-hunter super experts. I don´t know what exactly they tell, but always keep in mind you want organically rank on a search engine, and we all know google wants you to follow there SEO ranking factors, mentioned the database synchro, the result is one databank for all Alphabet owned websites with a search function. so just teach yourself what the industry requires and follow the rules, like in every other industry in the world. why should it be different?