I made an app for this actually, called Showcase. You can bookmark any content——Youtube videos, websites, Tweets, Instagram posts—— and store it all together. You can use it on browser where you can paste directly onto the canvas (+ chrome extension coming) or iOS that has a Share Extension too.

It's also free ;)

Demo for Showcase: https://www.youtube.com/watch?v=ehGolVAHm8U

App Store link: https://apps.apple.com/gb/app/showcase-co/id6740991352?platf...