I've gotta go with flooding, bad atty, bad batt, or a combo of any of these.
When I've flooded the attys, the vapor production is similar to what I see in the vid. Same with a bad atty OR a weak batt.
Do they draw hard?
Don't give up...the 510 really IS a great PV (and so is the 801).
Where did you get your setup?
The draw is easy on all my 3-piece rigs. I got my 510's from RMV.
I've flooded my atties before, cleaned them & caried on. Both my 510 batts act the same. My 801 & 901 act the same. No satisfaction, no relief, no flavor.
My quest continues!