Wireless HDMI Transmitter and Receiver kit

you can do a better job explaining and maybe adding subtitles as I can't see which HDMI to which transmitter vs. receiver inputs

where to buy?

how to pair them? is there any video? I can't do it, or are they broken?

How can I reset them? I just bought my transmitters but they don't work or they don't transmit a signal

i would like to have 1transmitter and 3 receivers - where do we purchase?

I would love to review these on my channel

How many kits can I use in a same place? Like a podcast room?