Check to make sure you have continuity on your flame sensor - it's located on left side of the flame tube (2 wires going to it) on left side of your video.
I did check flame sensor and it had continuity. However, one thing I discovered last night was that having dryer front panel and door off was an issue. When I covered the dryer door opening with towel, the flame stayed on. So Iím thinking not having an adequate exhaust draw with front door off was possibly making dryer sense exhaust vent was clogged....Or so Iím guessing. Anyway, Iím now hoping the new coils were the actual fix, but will have to see after next dryer loads are completed.🤞