BASH script to record Android display and download/delete the video

AndroidRecord.sh

function adb-screenrecord(){
	#name the file
	filename=screen_record_$(date +"%s").mp4
	
   	# start recording
	adb shell screenrecord --bit-rate 6000000 /sdcard/$filename &

	# Get its PID
	PID=$!

	# Upon a key press
	read -p "Press [Enter] to stop recording..."

	# Kills the recording process
	kill $PID

	# Wait for 3 seconds for the device to compile the video
	sleep 3

	# Download the video
	adb pull /sdcard/$filename ~/Desktop/$filename

	# Delete the video from the device
	adb shell rm /sdcard/$filename

	# Kill background process incase kill PID fails
	trap "kill 0" SIGINT SIGTERM EXIT
}