So I also packed ALL space between seal and bearing with lithium based grease before assembly.
That is what I do at every tire change, except I use Mobil 1 synthetic grease, which is what I usually use for packing wheel bearings and general purpose heavy grease. Just changed my F&R tires and the front bearings are smooth as silk. Goes without saying I clean the seals thoroughly before packing in grease.
Wheel bearings are relatively inexpensive... even name brand quality ones. Cost less than an oil change with good synthetic motorcycle oil. Front wheel bearing R&R is not that difficult to DIY, either.
You don't even have to use the tool that is shown in that video, really.