Is HD, Replay, Popout for YouTube™ safe?

Medium risk

HD, Replay, Popout for YouTube sends popout video embed URLs to uslocaltv.appzend.net.

When you use the popout player on a YouTube watch page, the extension extracts the current video's ID and builds a YouTube embed URL. It then loads that embed through uslocaltv.appzend.net/play.php, sending the selected video URL to that third-party host.

Smart Softwarev1.0.1.9Chrome Web Store
45Risk
Who publishes it

Smart Software - 7 other listings from the same operator, none carrying a finding

What this publisher told the store about itself, and the other listings that told it the same thing.

Publisher
Smart Software

Same store account

7 other listings published from this account, 343k+ users between them, none of them carrying a finding.

Spell Checker for Chrome100k+LowOneClick Cleaner90k+CleanUser Agent Switcher, URL sniffer70k+CleanWorld Weather Forecast50k+CleanAwesome PDF Viewer, Reader20k+LowQR Code Maker and Decoder10k+Clean1 more listing in the relationship graph, on paid plans →

Shared hosts - 1 hostname

Hostnames hardcoded in this extension that few other listings call. That can mean one operator behind both, and it can equally mean a small shared vendor, so it is context rather than a conclusion. Hosts that many listings call are left out: they are services, not connections.

hexmen.com
Also called by 4 other listings, including SIH

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

Findings

Popout player sends YouTube video URL to AppZend player endpoint

When you click the popout control on a YouTube watch page, the extension extracts the selected video's ID and builds a YouTube embed URL.

It sends that video URL to uslocaltv.appzend.net/play.php so the remote player page can load it.

Severity
Medium unwanted
Type
Unexpected
CWE
CWE-359
Source
Dynamic sandbox
What actually happens
You did this

The user clicks the popout button on a YouTube watch page.

The extension did this

The extension extracts the selected video's ID, builds a YouTube embed URL, and loads the remote player endpoint with that URL.

Captured request
GETuslocaltv.appzend.net/play.php
Fields in the request
  • Selected video URL
    https://www.youtube.com/embed/dQw4w9WgXcQ?autoplay=1 (illustrative)

    Shows which YouTube video you opened in the popout player.

What it can do

Permissions this extension asks for, as declared in version 1.0.1.9. Asking for a permission is not a finding on its own - it is what the extension can do if it chooses to.

  • Read and change your data on youtube.com

    *://*.youtube.com/*

  • Store data in your browser

    storage

  • Act on the current tab, but only after you click the extension

    activeTab

Where it sends data

Destinations our analysis observed HD, Replay, Popout for YouTube™ contacting. Sending data somewhere is not a finding on its own - an extension that syncs your settings has to talk to its own server - but it is where your data can go, and who else it goes to.

  • uslocaltv.appzend.net

    HD, Replay, Popout for YouTube™ sends data to uslocaltv.appzend.net. No other extension we have analysed sends data here.

Updated 30 September 2026oabcncpmomlmkkeagpphpfncjdmmnipk