If you have the 365/subscription version, you can use the BCC Beauty Studio tool from BorisFX that may smooth over the flecks and dim the sparkles. You can apply more than one FX, each tuned to a specific color, and it would be at least 100x easier than trying to manually remove the specks from every frame. The advantage of this FX is that even if there's a lot of motion, the effect can be applied to a wide area.
If you're not moving very much in the video, you can also/instead use BCC Remover and/or BCC Pixel Fixer to visually remove (by re-mapping over the specks from a clean area) or completely blur out the individual flecks, respectively. The advantage of these FX is that they will completely remove the offending flecks, but you may need to use keyframes to track them whenever they or the camera changes position.
YouTube/optodata
DS365 | Win11 Pro | Ryzen 9 3950X | RTX 4070 Ti | 32GB RAM | 10TB SSDs | 5K+4K HDR monitors
Canon Vixia GX10 (4K 60p) | HF G30 (HD 60p) | Yi Action+ 4K | 360Fly 4K 360°