That depends on what you mean by 'own music' and the intended audience for your videos.
If the 'audience' is yourself then, in theory, you can use any music you have purchased, providing you have not broken any Digital Rights Management such as may be applied to some music sources such as iTunes.
If the video is for a 'public' audience eg uploaded to Youtube or other publc websites, then:
If you scored and created the music by playing the instruments or using a program and playing VST instruments yourself then there is no limitation. Soundloops used in music creation software may require a Commercial Licence.
If the music is from a third party or commercially available, it is usually Copyrighted, and should not use it without permission from the Copyright owner, this may not be the musician(s) who created and/or performed it commercially. Use without permission risks action being taken, this could range from a 'Take down' notice up to legal action against you.
If the music is from a third party or commercially available, it is usually Copyrighted, and should not use it without permission from the Copyright owner, this may not be the musician(s) who created and/or performed it commercially. Use without permission risks action being taken, this could range from a 'Take down' notice up to legal action against you.
That said, many artists/copyright holders allow you to use their music on YT because of the exposure and ad revenue. In my case, none of my videos are monetised (that is, I don't make any money from the ads that are shown) and I've used commercial songs with no issue; the song's details is placed in the YT description by YT so everybody can see the details. This is, of course, free advertising for the artist. In one case, A video I posted was picked up by a playlister and the artist has now been exposed to over 1 million views. Think of the advertising revenue the artist will have got from that.
However, you may come across a song that isn't allowed to be used and may even incur a copyright strike, which is not good. I therefore have a second YT channel where I "test" a song, just in case I get a strike and my test channel is suspended, before I put it up on my normal channel.