VidBlaster Replay is not a standalone product, it is just one of many setups you can build with VidBlaster. Its modular approach makes VidBlaster extremely versatile: you decide how many inputs (aka camera angles) your replay system has, where the signals come from (e.g. SDI, NDI, IP or a mix), how many outputs you require and where and how they are displayed, and whether it is a dedicated system or part of e.g. a vision mixer. Lastly you are also free to choose the controller you wish to use. You can even use VidBlaster as a black box and control your replay system from your own application!

It would be impossible to describe every possible combination, but no worries: if the documentation is not enough you can get free help in one of the communities or, if you own a valid Broadcast licence, get it from the developer personally. 

Example 1: drop-in replacement for professional replay system

As an example lets describe a typical setup often used as a drop-in replacement for a commonly used replay system. Typically this has 4 HD-SDI inputs, 2 HD-SDI outputs to the vision mixer, and local viewing on the PC monitor. Assuming you want your replay system to feel as familiar as possible to your operators we'll choose the controller from  JLCooper. An average modern PC like a Dell Precision 3680 is more than capable of handling this, note a graphics card is not required but do add an NVMe SSD drive and e.g. a Blackmagic Design DeckLink Quad 2.

All you need to do now is build the desired profile using 4 DeckLink Input modules, 2 DeckLink Output modules, 1 (collapsed) Replay and 1 JLCooper I/O module.

For your convenience this profile comes ready-made with VidBlaster, it's named Replay4DLIn2DLOutJLC and is optimised for a 1920*1080 PC monitor. The default settings are for 1080p50 and EBU audio, you may need to change that as well as the (SSD) Record Drive. A price indication for discussed setup is roughly 2000 euros for the Dell, the SSD and DeckLink and 3500 euros for the controller, making your one-time investment 5500 euros. You can also opt for the Skaarhoj Time Spin (XC8) which has a less familiar layout but is almost 1000 euros cheaper. For this setup the VidBlasterX Broadcast licence is required which is 995 euros/year.