Hi,
One thing I don't understand on the first vid, your WR is hitting the defender, then is allowed to continue his run.
On the rulesets I readed (and try to follow as a newbie), when a defender hit a offense player (especially in your vid, with the "front base tackle rule" ), it's a tackle, no ?
Thanks your for the explaination
edit : seeing the vid carefully, it appears that the defender base doesn't
really touch the WR base, is it why you do not declare the tackle ?