diff --git a/README.md b/README.md
index bd96fdd..8c49dac 100644
--- a/README.md
+++ b/README.md
@@ -2,19 +2,28 @@
 ## Description
 This bot can download music and videos from youtube.
 ## Installation
-### Docker
+
+### Step 1
 1) Install docker (how you can install it on linux: https://fullgream.tech/knowledge-base?post=docker-install)
 2) Clone repository: `git clone https://git.fullgream.tech/fullgream/telegram_ytdlp_node.js.git`
-3) Create file `cookies.txt` in program directory *(You can use **Get cookies.txt loccaly**: https://chromewebstore.google.com/detail/get-cookiestxt-locally/cclelndahbckbenkjhflpdbgdldlbecc)*
-4) Create telegram bot, get token: https://t.me/BotFather
-5) Edit file .env
+### Step 2. If you will use MTProto API
+1) Go to [https://my.telegram.org/apps](Telegram API Development Tools). And create API_ID and API Hash.
+2) Go to `/src-tg` folder in clonned folder
+3) Run docker container with command: `docker build -t telegram_create_session . && docker run -it --rm telegram_create_session && docker rmi telegram_create_session`
+4) Type all answers
+5) Write to `.env` file SESSION value and go to `..`. (Next steps of next part from step 3)
+### Step 3
+1) Create file `cookies.txt` in program directory *(You can use **Get cookies.txt loccaly**: https://chromewebstore.google.com/detail/get-cookiestxt-locally/cclelndahbckbenkjhflpdbgdldlbecc)*
+2) Create telegram bot, get token: https://t.me/BotFather
+3) Edit file .env
 ```env
 BOT_TOKEN=<YOUR_TELEGRAM_BOT_TOKEN>
 ADMIN_LIST=<Admin ID list, separate ", "> (example: 123,321, 678, 911 , 228)
 WHITELIST=<User list, separate ", " (Important: Admin list will add to whitelist automatly)> (example: 123,321, 678, 911 , 228)
-SHOW_ALL_FORMATS=<Show all formats from video (1, 0 - Only '.mp4', 'm4a')>
+API_ID=<If you use MTProto API. Type here API_ID from Telegram API Development Tools>
+API_HASH=<If you use MTProto API. Type here API_HASH from Telegram API Development Tools>
+API_SESSION=<If you use MTProto API. Type here API_SESSION from Session get script (Step 2)>
+CHAT_ID=<If you use MTProto API. ID of chat. You can send new message and chat and use command: curl -s "https://api.telegram.org/bot$BOT_TOKEN/getUpdates" (REPLACE '$BOT_TOKEN' to Your Bot token!!!)>
 ```
-6) Build docker container:
-`docker build -t ytdlp_node:release .`
-7) Up docker container:
-`docker run -d --name ytdlp_node --restart unless-stopped --env-file .env -v "$(pwd)/cookies.txt:/app/cookies.txt" ytdlp_node:release`
+4) Build docker container: `docker build -t ytdlp_node:release .`
+5) Up docker container: `docker run -d --name ytdlp_node --restart unless-stopped --env-file .env -v "$(pwd)/cookies.txt:/app/cookies.txt" ytdlp_node:release`
diff --git a/src/bot.js b/src/bot.js
index a38d1db..bec51b5 100644
--- a/src/bot.js
+++ b/src/bot.js
@@ -262,7 +262,7 @@ class VideosGarbageCollector {
 	}
 	
 	removeTemp () {
-		if (Object.keys(tgChatsDownloaded) === 0)
+		if (Object.keys(tgChatsDownloaded).length === 0)
 			removeTemp();
 	}
 }
diff --git a/src/mtproto.js b/src/mtproto.js
index 1f97cde..707b082 100644
--- a/src/mtproto.js
+++ b/src/mtproto.js
@@ -7,7 +7,7 @@ const path = require("path");
 //const mime = require("mime");
 const config = require("./config");
 
-const d = v => console.debug("DEBUG:", v) || v;
+//const d = v => console.debug("DEBUG:", v) || v;
 class MTProtoUser {
 	constructor(apiId, apiHash, sessionId) {
 		const stringSession = new StringSession(sessionId);
@@ -38,7 +38,7 @@ class MTProtoUser {
 		const msg = await this.client.sendFile(config.mtproto.chatId, {
 			file,
 			caption: message,
-			thumb: d(options.thumb),
+			thumb: options.thumb,
 			//filename: options.filename,
 			supportsStreaming: true,
 		});