Does fast playback skip frames?

No — the player processes every frame. At very high speeds the video becomes hard to follow visually, but nothing is dropped.

Will speeding up a video affect Netflix or course progress tracking?

No. Glitch controls playback locally in your browser. The site sees you as watching normally and records progress as expected.

Yes — set your preferred speed once and Glitch remembers it across sessions. Pro users can also set different defaults per site.

Updated May 4, 20265 min read

Speed control is the most common reason people install a video extension. Here is a 2026 comparison of the leading options and what to look for.

1
Step 1
Decide whether you need pitch correction
Without pitch correction, voices sound chipmunky at 2× and slow speech sounds drunk. Pitch-locked speed avoids both. Glitch keeps pitch correction on by default so you never have to think about it.
Featurepitch correction
2
Step 2
Check site coverage
YouTube-only extensions skip Netflix, Twitch, TikTok, and any course platform. Glitch covers all of them — any page with a video works automatically.
SiteYouTube SiteNetflix SiteTwitch SiteTikTok
3
Step 3
Look at the speed range
Free extensions often cap at 2×. Glitch offers 0.5×–2× free and 0.25×–16× with Pro for serious slow-motion study or rapid catch-up.
Featurespeed range
4
Step 4
Check keyboard shortcuts
Look for customizable shortcuts and a reset-to-1× key. Glitch ships sensible defaults and lets you remap every shortcut to whatever feels natural.
Featurekeyboard shortcuts
5
Step 5
Verify it does not affect site progress tracking
Speed control should not interfere with course completion or DRM. Glitch runs entirely in your browser and sends nothing to servers.
FeatureSpeed control
6
Step 6
Try Glitch free
Speed control, pitch lock, and full-video loop are all free with no account needed. Install and start watching faster in under a minute.
FeatureSpeed control Featureloop

Does fast playback skip frames?
No — the player processes every frame. At very high speeds the video becomes hard to follow visually, but nothing is dropped.
Will speeding up a video affect Netflix or course progress tracking?
No. Glitch controls playback locally in your browser. The site sees you as watching normally and records progress as expected.
Can I set a default speed that applies to every video automatically?
Yes — set your preferred speed once and Glitch remembers it across sessions. Pro users can also set different defaults per site.

Open the interactive demo to test karaoke, speed, filters, audio tools, and export before installing.