From my experience, when you're on a WLAN computer with Winpcap installed, getting
URL Snooper 2.x (or
NetTransport's sniffer module) to work can be troublesome. A simple workaround fix is: install a (your preferred!) vpn client software and connect to the internet thru the vpn client. Then launch URL Snooper 2 (or NetTransport) and pick as network adapter the vpn network adapter. Dont pick the WLAN adapter, and dont pick the standard network adapter. Now URL Snooper 2 (or NetTransport's sniffer module) will work!
Having said that, i've compared the power of
all URL sniffers/finders with respect to
websites with Adobe Flash Player RTMP-streaming (*.FLV); my "opinion" - US highschool grading:
StreamTransport and Coojah work well with protected streams for a limited (short) period after they have been updated by their Chin*se authors. But since they are updated too infrequently, in practice the two FREEWARE tools seldom do a great service. Let's note that freeware tools often undergo a similar fate: after years of development the updating comes to a gradual end,...or the software turns commercial
hope this helps.