This is what goggle say:
Not only does watermarking help with video theft protection, but a watermarked video will help increase brand recognition. By adding watermarks to every YouTube video, viewers will consistently see your brand and associate it with your video content.
Tags do nothing to help the video to get views! KEYWORD in title and description and saying those KEYWORD or TITLE in your video help the Algorithm to understand what your video is about so it can show the right video to the right viewer!
Go on YouTube Studio , go down to Customization , on layout go to featured section to add section , Click on Featured channels then go Edit section contents and type in the YouTube name who you want to featured! Hope this helpful!! Can't wait to see u grow
On my other channel shorts are doing great I gain 33 subscriber and views for this month is 13.4K once u get the beta on your phone it will say Create a short so don't have to put #shorts in title or description
No and No because it scores high that doesn't mean that what viewer are searching for! Keyword explorer is only good for beginning who don't know what to do on YouTube.You have to make your titles and thumbnail as Great for viewer to click on!