Update issue templates

Add log files steps to bug-report template

.github/ISSUE_TEMPLATE/bug_report.md

@@ -23,8 +23,25 @@ assignees: ''
 **Describe the bug**
 A clear and concise description of what the bug is.
 
-**FFMPEG logs**
-[use ssh to open logs in `/tmp/ffmpeg.log` then put the content in a code block / create a [gist](https://gist.github.com/)]
+**Provide Log files**
+- Start the video on VideoStation, wait for the video to play and put the browser in background (keep the video playing)
+- Connect through SSH ([help](https://www.synology.com/en-global/knowledgebase/DSM/tutorial/General_Setup/How_to_login_to_DSM_with_root_permission_via_SSH_Telnet))
+- Switch to root user: `sudo -i`
+
+## `ffmpeg.log` (containing the ffmpeg-wrapper execution logs)
+- Go to the temporary directory: `cd /tmp`
+- Type `ls -al | grep ffmpeg` to list all files containing "ffmpeg" and check you have one named `ffmpeg.log`
+- Type `tail -200 ffmpeg.log` to print the last 200 lines to the console
+- Copy paste those lines in a new [gist](https://gist.github.com/)
+- Add the gist link to the issue
+
+## `ffmpeg-FFMxxxx.stderr` (containing chunks transcoding operations)
+- When you ran `ls -al | grep ffmpeg` you should have seen another file that looks like `ffmpeg-FFMxxxx.stderr`
+- Type `tail -100 ffmpeg-FFMxxxx.stderr` (replacing the filename by the correct one)
+- Copy paste those lines in a new [gist](https://gist.github.com/)
+- Type `head -300 ffmpeg-FFMxxxx.stderr` (replacing the filename by the correct one)
+- Copy paste those lines in another new [gist](https://gist.github.com/)
+- Copy paste all the gists links in the issue
 
 **Additional context**
 Add any other context about the problem here.