Version 1.5.0

New:
- Works on Twitch (VODs/clips), Vimeo, Udemy, Coursera, and Nebula, in addition to YouTube
- Temporary slow-down ("dip"): drop the speed for a set time during dense sections, then return to where the ramp would have been (Alt+Shift+D or the popup)
- Popup shows live speed, ramp progress, and time remaining

Improved:
- Reliable control of players embedded in iframes (course sites)
- Correct behavior when a page has multiple videos: commands target the actual player, and Reset restores every video the extension touched
- Ramp and dip settings are validated; out-of-range values are rejected

Fixed:
- Reset now restores each video to its own original speed after a dip
- Popup no longer briefly shows stale status after pressing a button

Speed Ramp still collects nothing and makes no network requests. All settings stay local.