How to broadcast the screen of a computer / DVR to a TV / monitor?

Question

Video broadcast

Hello!

There are two tasks:

1. Connect the TV (VGA, "bells") to the Monoblock (HDMI). The distance between them is ~21m.
Is there a prefix suitable for this task? To connect to it via WiFi and broadcast the laptop screen to TV?
Or any one with WiFi will do? For example, this one (I understand correctly that I can connect composite AV to "bells"?)?

2. Connect the monitor (VGA, HDMI) to the DVR (VGA, HDMI). The distance between them is ~51m.
This problem is more difficult. HDMI-wire for 50m costs 13,000 rubles, I would like to meet a smaller amount. Here I have absolutely no ideas :(

Help me solve them, because I don’t really understand this :)

Answer 1

1. The prefix is ​​\u200b\u200bneeded on a bare android. Do you just want to broadcast a picture from the monoblock screen? And what kind of sophie?
The prefix, in theory, is suitable from the point of view of the AV
2 computer output. If you don’t pull the cable, then it’s easier to put a mini-PC there, a nettop which thread will be used, and you can already open a program on it to view the DVR and watch via wifi. Or pick up a prefix on androyd