I was really disappointed when I recently wanted to watch him play Jamerson's line to You Don't Have to be a Star and found all of his videos gone. I've found his videos to be instructional, inspirational and just fun to watch. I know that Marlowe DK has had problems with his play along videos on YouTube, and I think Jason had to move to YouPlayAlong for the same reasons.
What really pisses me off is that the record companies seem to go after the truly exceptional players. You can still find play along videos on YouTube of someone massacring the same songs that Marlowe or Jason had to take down. YouPlayAlong still has dozens of play along videos of varying quality.
I think it's stupid for record companies to object to play along videos, since they don't prevent me from buying music. In fact they tend to get me interested in artists or songs I didn't know about. His video of "Streetbeater" made me more interested in Quincy Jones' music, for example.
It is possible that BassPlayer may have complained that he was using their transcriptions but again, his videos only serve as excellent advertisement for them, and made me want to purchase them.
Mr. Long may be planning on releasing his own instructional videos for profit, or starting his own website.
He may have joined a band and entered into contractual obligations that obliged him to take down the videos.
He may have grown tired of fielding questions from aspiring bassists blowing up his inbox or asking for tabs.
That being said, I think this is his Facebook page. I remember his YouPlayAlong profile saying something about aviation/piloting. And he likes Flea.
Jason Long | Facebook
Perhaps a few respectful reminders from the bass community about how helpful his videos were might persuade him to repost them.
Jason Long Videos 
