uBlock cosmetic filters

Click the gears icon in the uBlock control panel, choose the “My Filters” tab, and paste these in.

Hide all podcasts from Spotify

open.spotify.com##section[aria-label="Shows to try"]
open.spotify.com##section[aria-label="Episodes for you"]
open.spotify.com##section[aria-label="Browse all"] a[href*="podcasts"]
open.spotify.com##div[data-testid="topbar-content"] nav a[href*="podcasts"]
open.spotify.com##div[data-testid="grid-container"] div:has(:scope a[title="Daily Drive"])
open.spotify.com##div[data-testid="grid-container"] div:has(:scope a[title="Daily Wellness"])

Hide non-ad promotions and news from Youtube homepage

www.youtube.com###dismissible.ytd-primetime-promo-renderer
www.youtube.com###dismissible:has(#badge-container:has-text(Featured))
www.youtube.com###dismissible:has(#featured-badge)
www.youtube.com###dismissible:has(:scope #title-container:has-text(Breaking news))
www.youtube.com###dismissible:has(:scope #title-container:has-text(COVID-19))

twitter.com##[aria-label$="Trending now"]