FIMI X8 CPL and UV Filter Mar 6

I have no knowledge about filming and filter efficiency.
So gathered following information;
A) X8 gimbal uses small motors so need to use very light weight filter to avoid gimbal stalling
B) CPL filter has Max, Min. efficiency by angle so need to check by rotating the CPL filter to mark Max. Middle and Min.
C) CPL filter is good for using in sunny condition
D) UV filter is a) useless for digital camera the other comment b) good for cloudy condition
E) ND filter needs manual shutter control to obtain good result. Appropriate shutter speed (SS) is calculated 1/FPS x 2.
In case 4K 30FPS, best SS is 1/30 x 2 = 1/60
At this moment, X8 has no manual shutter speed setting for video, ND filter is less usable

To test if above understanding is correct, purchased JSR UV filter (ID 1535746 URUAV as JSR was out of stock at ordering) and JSR CPL filter (ID 1566851 Banggood).

1) Measured weight of CPL and UV filter which shows 0.76g CPL, 0.61g UV filter.
2) Checked gimbal stability with both filters – looks O.K. for both start up and after stabilizing.
3) Checked CPL best efficient point and minimum point by looking outside and marked the position at outer ring.
Max. point – marked as III with red color and mount of top of Gimbal camera
Min. point – marked as I with black color (which is 90degree rotating from III)
50% point – marked as I with red color (which is 45degree rotating from III)
4) Put X8 on the same place and took video in different condition
Video setting 4K 30FPS, White Balance Auto, Color Vivid, Style Sat 60, Cont 60
A) Cloudy condition – 100% covered by cloud (Mar 4)
a) Canon SX620SH Video
b) No filter video
c) CPL filter Max. efficient video
d) CPL filter 50% point video
e) CPL filter Min. efficient video
f) UV filter video
B) Sunny condition – 0% cloud (Mar 6)
Color setting was changed to General as vivid was too exaggerated in test at cloudy day (above A).
g) Canon SX620SH Video
h) No filter video
i) CPL filter Max. efficient video
j) CPL filter 50% point video
k) CPL filter Min. efficient video
l) UV filter video

To my poor eyes, in Cloudy condition, ND filter would be better – set as vivid which might give excessive color tone.
In Sunny condition, CPL Minimum would be better.

Will take video with CPL/UV filter in actual flight.

Timeline is;
0:00 CPL Filter
0:25 0.76g
0:32 UV Filter
0:53 0.61g
1:02 Gimbal start up with CPL filter
2:34 Gimbal start up with UV filter
3:44 CPL filter – position of Max, Middle, Min effect
4:14 Test for max, Middle, Minimum effect
Cloud day
4:38 Cloud day - 100% cloud – comparison of filters Mar 4
4:48 Canon SX620HS Auto mode
4:58 Parameter check – FC 1060C, Camera 1020A
5:09 4K 30FPS, Color Vivid, Style Sat 60, Cont 60
5:44 No filter, vivid
5:57 X8 4K – No filter
6:18 CPL filter – Effect max. Vivid
6:36 X8 4K – CPL max.
6:59 CPL filter – Effect Middle, vivid
7:21 X8 4K – CPL middle
7:51 CPL filter – Effect Min. Vivid
8:14 X8 4K – CPL min
8:38 UV filter, vivid
8:56 X8 4K – UV filter
9:24 Side by side – Left no filter, Right UV filter
9:48 Side by side – From left to right – UV filter vs CPL middle vs CPL min
Sunny day
10:15 Sunny day – 0% cloud Mar 6
10:26 Canon SX620HS Auto mode
10:49 Parameter FC 1060C, Camera 1020A
11:05 Video setting – Color changed to general from vivid
11:28 Style Saturation 60, Contrast 60
11:40 FPV No filter, General
11:51 X8 4K – No filter
12:14 FPV CPL Effect Max. General
12:26 X8 4K – CPL Max
12:46 FPV CPL Middle, General
12:58 X8 4K – CPL Middle
13:21 FPV CPL – Min. General
13:33 X8 4K – CPL Min
13:56 FPV UV filter
14:08 X8 4K – UV filter
14:30 Side by side Left Canon SX 620HS Right No filter
14:53 Left Canon Right CPL Max
15:17 Left Canon Right CPL Middle
15:40 Left Canon Right CPL Min.
16:04 Left Canon Right VU filter
16:27 Left CPL Min. Right UV filter
16:51 Left Canon, Center CPL Min, Right UV filter