How to combine so many ffmpeg filters in 1?
Use

ffmpeg -i input.mp4 -ignore_loop 0 -i watermark.gif -i arrow.png -i Dots.png -filter_complex "[0]scale=750:1334,setsar=1[v];[1]colorkey=0x54FF5F:0.1:0.2[ckout];[v][ckout]overlay=x=705:y=25:shortest=1[gif];[gif][2]overlay=x=310:y=1230[arw];[arw][3]overlay=x=705:y=25" -c:v libx264 -crf 20 -crf 16 output.avi


You should do the concat separately.