Linkify Plus Plus, is an extension that will automatically convert text into links so you don't have to copy the links on here manually.
For firefox, for chrome get a script manager like tampermonkey, and then try this.

For page loading, try this.
This will automatically load the next page so you don't have to click the next page number.

For downloading videos, try this.
A box will show up on a corner of the video, you can download different resolutions and stuff.